diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index 96e28fe87a8..f168334d9de 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -1261,6 +1261,8 @@ projects.column.new_submit = "Create Column"
 projects.column.new = "New Column"
 projects.column.set_default = "Set Default"
 projects.column.set_default_desc = "Set this column as default for uncategorized issues and pulls"
+projects.column.unset_default = "Unset Default"
+projects.column.unset_default_desc = "Unset this column as default"
 projects.column.delete = "Delete Column"
 projects.column.deletion_desc = "Deleting a project column moves all related issues to 'Uncategorized'. Continue?"
 projects.column.color = "Color"
diff --git a/routers/web/org/projects.go b/routers/web/org/projects.go
index ed6a2e645fe..37212179c95 100644
--- a/routers/web/org/projects.go
+++ b/routers/web/org/projects.go
@@ -610,6 +610,23 @@ func SetDefaultProjectBoard(ctx *context.Context) {
 	})
 }
 
+// UnsetDefaultProjectBoard unset default board for uncategorized issues/pulls
+func UnsetDefaultProjectBoard(ctx *context.Context) {
+	project, _ := CheckProjectBoardChangePermissions(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if err := project_model.SetDefaultBoard(project.ID, 0); err != nil {
+		ctx.ServerError("SetDefaultBoard", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"ok": true,
+	})
+}
+
 // MoveIssues moves or keeps issues in a column and sorts them inside that column
 func MoveIssues(ctx *context.Context) {
 	if ctx.Doer == nil {
diff --git a/routers/web/repo/projects.go b/routers/web/repo/projects.go
index cef6893fbd1..72f83f8b31c 100644
--- a/routers/web/repo/projects.go
+++ b/routers/web/repo/projects.go
@@ -576,6 +576,23 @@ func SetDefaultProjectBoard(ctx *context.Context) {
 	})
 }
 
+// UnSetDefaultProjectBoard unset default board for uncategorized issues/pulls
+func UnSetDefaultProjectBoard(ctx *context.Context) {
+	project, _ := checkProjectBoardChangePermissions(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if err := project_model.SetDefaultBoard(project.ID, 0); err != nil {
+		ctx.ServerError("SetDefaultBoard", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"ok": true,
+	})
+}
+
 // MoveIssues moves or keeps issues in a column and sorts them inside that column
 func MoveIssues(ctx *context.Context) {
 	if ctx.Doer == nil {
diff --git a/routers/web/web.go b/routers/web/web.go
index 30a8314691b..8f0b0b1f458 100644
--- a/routers/web/web.go
+++ b/routers/web/web.go
@@ -936,6 +936,7 @@ func RegisterRoutes(m *web.Route) {
 						m.Put("", web.Bind(forms.EditProjectBoardForm{}), org.EditProjectBoard)
 						m.Delete("", org.DeleteProjectBoard)
 						m.Post("/default", org.SetDefaultProjectBoard)
+						m.Post("/unsetdefault", org.UnsetDefaultProjectBoard)
 
 						m.Post("/move", org.MoveIssues)
 					})
@@ -1292,6 +1293,7 @@ func RegisterRoutes(m *web.Route) {
 						m.Put("", web.Bind(forms.EditProjectBoardForm{}), repo.EditProjectBoard)
 						m.Delete("", repo.DeleteProjectBoard)
 						m.Post("/default", repo.SetDefaultProjectBoard)
+						m.Post("/unsetdefault", repo.UnSetDefaultProjectBoard)
 
 						m.Post("/move", repo.MoveIssues)
 					})
diff --git a/templates/projects/view.tmpl b/templates/projects/view.tmpl
index 41bbb83f7b1..338524d1536 100644
--- a/templates/projects/view.tmpl
+++ b/templates/projects/view.tmpl
@@ -95,10 +95,25 @@
 									{{$.locale.Tr "repo.projects.column.edit"}}
 								</a>
 								{{if not .Default}}
-									<a class="item show-modal button" data-modal="#set-default-project-board-modal-{{.ID}}">
+									<a class="item show-modal button default-project-board-show"
+									data-modal="#default-project-board-modal-{{.ID}}"
+									data-modal-default-project-board-header="{{$.locale.Tr "repo.projects.column.set_default"}}"
+									data-modal-default-project-board-content="{{$.locale.Tr "repo.projects.column.set_default_desc"}}"
+									data-modal-default-project-board-submit="{{$.locale.Tr "repo.projects.column.set_default"}}"
+									data-url="{{$.Link}}/{{.ID}}/default">
 										{{svg "octicon-pin"}}
 										{{$.locale.Tr "repo.projects.column.set_default"}}
 									</a>
+								{{else}}
+									<a class="item show-modal button default-project-board-show"
+									data-modal="#default-project-board-modal-{{.ID}}"
+									data-modal-default-project-board-header="{{$.locale.Tr "repo.projects.column.unset_default"}}"
+									data-modal-default-project-board-content="{{$.locale.Tr "repo.projects.column.unset_default_desc"}}"
+									data-modal-default-project-board-submit="{{$.locale.Tr "repo.projects.column.unset_default"}}"
+									data-url="{{$.Link}}/{{.ID}}/unsetdefault">
+										{{svg "octicon-pin"}}
+										{{$.locale.Tr "repo.projects.column.unset_default"}}
+									</a>
 								{{end}}
 								<a class="item show-modal button" data-modal="#delete-board-modal-{{.ID}}">
 									{{svg "octicon-trash"}}
@@ -134,18 +149,16 @@
 									</div>
 								</div>
 
-								<div class="ui basic modal" id="set-default-project-board-modal-{{.ID}}">
+								<div class="ui basic modal default-project-board-modal" id="default-project-board-modal-{{.ID}}">
 									<div class="ui icon header">
-										{{$.locale.Tr "repo.projects.column.set_default"}}
+										<span id="default-project-board-header"></span>
 									</div>
 									<div class="content center">
-										<label>
-											{{$.locale.Tr "repo.projects.column.set_default_desc"}}
-										</label>
+										<label id="default-project-board-content"></label>
 									</div>
 									<div class="text right actions">
 										<button class="ui cancel button">{{$.locale.Tr "settings.cancel"}}</button>
-										<button class="ui primary button set-default-project-board" data-url="{{$.Link}}/{{.ID}}/default">{{$.locale.Tr "repo.projects.column.set_default"}}</button>
+										<button class="ui primary button default-project-board-button" id="default-project-board-submit"></button>
 									</div>
 								</div>
 
diff --git a/templates/repo/projects/view.tmpl b/templates/repo/projects/view.tmpl
index acbd0241d4a..2ad40d700a3 100644
--- a/templates/repo/projects/view.tmpl
+++ b/templates/repo/projects/view.tmpl
@@ -99,10 +99,27 @@
 									{{$.locale.Tr "repo.projects.column.edit"}}
 								</a>
 								{{if not .Default}}
-									<a class="item show-modal button" data-modal="#set-default-project-board-modal-{{.ID}}">
+									<a class="item show-modal button default-project-board-show"
+									data-modal="#default-project-board-modal-{{.ID}}"
+									data-modal-default-project-board-header="{{$.locale.Tr "repo.projects.column.set_default"}}"
+									data-modal-default-project-board-content="{{$.locale.Tr "repo.projects.column.set_default_desc"}}"
+									data-modal-default-project-board-submit="{{$.locale.Tr "repo.projects.column.set_default"}}"
+									data-type="set_default"
+									data-url="{{$.Link}}/{{.ID}}/default">
 										{{svg "octicon-pin"}}
 										{{$.locale.Tr "repo.projects.column.set_default"}}
 									</a>
+								{{else}}
+									<a class="item show-modal button default-project-board-show"
+									data-modal="#default-project-board-modal-{{.ID}}"
+									data-modal-default-project-board-header="{{$.locale.Tr "repo.projects.column.unset_default"}}"
+									data-modal-default-project-board-content="{{$.locale.Tr "repo.projects.column.unset_default_desc"}}"
+									data-modal-default-project-board-submit="{{$.locale.Tr "repo.projects.column.unset_default"}}"
+									data-type="unset_default"
+									data-url="{{$.Link}}/{{.ID}}/unsetdefault">
+										{{svg "octicon-pin"}}
+										{{$.locale.Tr "repo.projects.column.unset_default"}}
+									</a>
 								{{end}}
 								<a class="item show-modal button" data-modal="#delete-board-modal-{{.ID}}">
 									{{svg "octicon-trash"}}
@@ -138,18 +155,16 @@
 									</div>
 								</div>
 
-								<div class="ui basic modal" id="set-default-project-board-modal-{{.ID}}">
+								<div class="ui basic modal default-project-board-modal" id="default-project-board-modal-{{.ID}}">
 									<div class="ui icon header">
-										{{$.locale.Tr "repo.projects.column.set_default"}}
+										<span id="default-project-board-header"></span>
 									</div>
 									<div class="content center">
-										<label>
-											{{$.locale.Tr "repo.projects.column.set_default_desc"}}
-										</label>
+										<label id="default-project-board-content"></label>
 									</div>
 									<div class="text right actions">
 										<button class="ui cancel button">{{$.locale.Tr "settings.cancel"}}</button>
-										<button class="ui primary button set-default-project-board" data-url="{{$.RepoLink}}/projects/{{$.Project.ID}}/{{.ID}}/default">{{$.locale.Tr "repo.projects.column.set_default"}}</button>
+										<button class="ui primary button default-project-board-button" id="default-project-board-submit"></button>
 									</div>
 								</div>
 
diff --git a/web_src/js/features/repo-projects.js b/web_src/js/features/repo-projects.js
index a1e177e4617..a2679130d70 100644
--- a/web_src/js/features/repo-projects.js
+++ b/web_src/js/features/repo-projects.js
@@ -126,19 +126,30 @@ export function initRepoProject() {
     });
   });
 
-  $(document).on('click', '.set-default-project-board', async function (e) {
-    e.preventDefault();
+  $('.default-project-board-modal').each(function () {
+    const boardColumn = $(this).closest('.board-column');
+    const showButton = $(boardColumn).find('.default-project-board-show');
+    const commitButton = $(this).find('.default-project-board-button');
 
-    await $.ajax({
-      method: 'POST',
-      url: $(this).data('url'),
-      headers: {
-        'X-Csrf-Token': csrfToken,
-      },
-      contentType: 'application/json',
-    });
+    if ($(showButton).data('type') === 'unset_default') {
+      $(commitButton).removeClass('primary');
+      $(commitButton).addClass('red');
+    }
 
-    window.location.reload();
+    $(commitButton).on('click', (e) => {
+      e.preventDefault();
+
+      $.ajax({
+        method: 'POST',
+        url: $(showButton).data('url'),
+        headers: {
+          'X-Csrf-Token': csrfToken,
+        },
+        contentType: 'application/json',
+      }).done(() => {
+        window.location.reload();
+      });
+    });
   });
 
   $('.delete-project-board').each(function () {