diff --git a/src/modules/platform-api/platform-api.controller.ts b/src/modules/platform-api/platform-api.controller.ts
index 0c3cd55..16d27b3 100644
--- a/src/modules/platform-api/platform-api.controller.ts
+++ b/src/modules/platform-api/platform-api.controller.ts
@@ -807,7 +807,6 @@ export class PlatformApiController {
   @Post('pipelines/:pipelineId/pipeline_run/:runId/cancel')
   @ApiOperation({ summary: 'Cancel a running pipeline run' })
   @RequireAllPermissions(PERMISSIONS_GROUPS.PIPELINE.permissions.UPDATE)
-  @UseGuards(PipelineExecutionGuard)
   async cancelPipelineRun(
     @Param('pipelineId') pipelineId: string,
     @Param('runId') runId: string,
@@ -816,6 +815,16 @@ export class PlatformApiController {
     const normalizedPipelineId = this.normalizePipelineId(pipelineId);
     const normalizedRunId = this.normalizePipelineId(runId);
 
+    const status = await this.platformApiService.proxy(
+      'GET',
+      `/pipeline/${normalizedPipelineId}/pipeline_run`,
+      user,
+    );
+
+    if (status.length === 1) {
+      throw new BadRequestException('The first pipeline cannot be canceled');
+    }
+
     return this.platformApiService.proxy(
       'POST',
       `/pipeline/${normalizedPipelineId}/pipeline_run/${normalizedRunId}/cancel`,