diff --git a/apps/api/src/app/admin/admin.service.ts b/apps/api/src/app/admin/admin.service.ts
index 8325fa90ec..2ed5716594 100644
--- a/apps/api/src/app/admin/admin.service.ts
+++ b/apps/api/src/app/admin/admin.service.ts
@@ -19,7 +19,8 @@ import {
   AdminData,
   AdminUserResponse,
   AdminUsersResponse,
-  AssetProfileIdentifier
+  AssetProfileIdentifier,
+  Holding
 } from '@ghostfolio/common/interfaces';
 import { PropertyKey } from '@ghostfolio/common/types';
 
@@ -283,6 +284,35 @@ export class AdminService {
           )
         ]);
 
+        if (DataSource[newDataSource.toString()] === DataSource.MANUAL) {
+          await Promise.all([
+            this.symbolProfileService.deleteAssetProfileOverrides({
+              dataSource: DataSource.MANUAL,
+              symbol: newSymbol as string
+            }),
+            this.symbolProfileService.updateSymbolProfile(
+              {
+                dataSource: DataSource.MANUAL,
+                symbol: newSymbol as string
+              },
+              {
+                assetClass,
+                assetSubClass,
+                countries,
+                name,
+                sectors,
+                url,
+                holdings: (holdings as unknown as Holding[])?.map((holding) => {
+                  return {
+                    name: holding.name,
+                    weight: holding.allocationInPercentage
+                  };
+                })
+              }
+            )
+          ]);
+        }
+
         const [updatedAssetProfile] =
           await this.symbolProfileService.getSymbolProfiles([
             {
diff --git a/apps/api/src/services/symbol-profile/symbol-profile.service.ts b/apps/api/src/services/symbol-profile/symbol-profile.service.ts
index 7157f0856d..5c057338e8 100644
--- a/apps/api/src/services/symbol-profile/symbol-profile.service.ts
+++ b/apps/api/src/services/symbol-profile/symbol-profile.service.ts
@@ -35,6 +35,15 @@ export class SymbolProfileService {
     });
   }
 
+  public async deleteAssetProfileOverrides({
+    dataSource,
+    symbol
+  }: AssetProfileIdentifier) {
+    return this.prismaService.assetProfileOverrides.deleteMany({
+      where: { symbolProfile: { dataSource, symbol } }
+    });
+  }
+
   public async deleteById(id: string) {
     return this.prismaService.symbolProfile.delete({
       where: { id }
diff --git a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
index c34e8eb78c..dec979a869 100644
--- a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
+++ b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
@@ -75,6 +75,7 @@ import {
   AssetClass,
   AssetSubClass,
   DataGatheringFrequency,
+  DataSource,
   MarketData,
   Prisma,
   SymbolProfile
@@ -467,6 +468,60 @@ export class GfAssetProfileDialogComponent implements OnInit {
     this.dialogRef.close();
   }
 
+  protected onConvertToManualDataSource() {
+    const convertedAssetProfile: UpdateAssetProfileDto = {
+      assetClass: this.assetProfile?.assetClass ?? undefined,
+      assetSubClass: this.assetProfile?.assetSubClass ?? undefined,
+      countries: this.assetProfile?.countries?.map(({ code, weight }) => {
+        return { code, weight };
+      }),
+      dataSource: DataSource.MANUAL,
+      holdings: this.assetProfile?.holdings?.map(
+        ({ allocationInPercentage, name }) => {
+          return { allocationInPercentage, name };
+        }
+      ),
+      name: this.assetProfile?.name ?? undefined,
+      sectors: this.assetProfile?.sectors?.map(({ name, weight }) => {
+        return { name, weight };
+      }),
+      symbol: crypto.randomUUID(),
+      url: this.assetProfile?.url ?? undefined
+    };
+
+    this.adminService
+      .patchAssetProfile(
+        {
+          dataSource: this.data.dataSource,
+          symbol: this.data.symbol
+        },
+        convertedAssetProfile
+      )
+      .pipe(
+        catchError(() => {
+          this.snackBar.open(
+            '😞 ' +
+              $localize`An error occurred while converting the asset profile to ${DataSource.MANUAL}.`,
+            undefined,
+            {
+              duration: ms('3 seconds')
+            }
+          );
+
+          return EMPTY;
+        }),
+        takeUntilDestroyed(this.destroyRef)
+      )
+      .subscribe(() => {
+        const newAssetProfileIdentifier = {
+          dataSource: convertedAssetProfile.dataSource,
+          symbol: convertedAssetProfile.symbol
+        };
+
+        this.dialogRef.close(newAssetProfileIdentifier);
+      });
+  }
+
   protected onDeleteProfileData({
     dataSource,
     symbol
diff --git a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html
index 9b69ef6fce..221cb11963 100644
--- a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html
+++ b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html
@@ -162,6 +162,17 @@
                     <ng-container i18n>Cancel</ng-container>
                   </button>
                 </form>
+                @if (data.dataSource !== 'MANUAL') {
+                  <p class="my-1" i18n>or</p>
+                  <button
+                    color="accent"
+                    mat-flat-button
+                    type="button"
+                    (click)="onConvertToManualDataSource()"
+                  >
+                    <ng-container i18n>Convert to MANUAL</ng-container>
+                  </button>
+                }
               </div>
             } @else {
               <div class="col-6 mb-3">