diff --git a/src/datasources/db/participantAPI.ts b/src/datasources/db/participantAPI.ts
index ce01f09..bd16bcf 100644
--- a/src/datasources/db/participantAPI.ts
+++ b/src/datasources/db/participantAPI.ts
@@ -25,7 +25,6 @@ import { Participant } from '../../model/Participant';
 import { EngagementType } from '../../model/EngagementType';
 import { ActionLogger, DBUtils, genDateRange, LockUtils } from './utils';
 import { UserInputError } from 'apollo-server-express';
-import { GraphQLError } from 'graphql';
 import { ResourceLockedError } from '../../errors/ResourceLockedError';
 
 export class ParticipantAPI extends DataSource {
diff --git a/src/resolvers/cargoBikeResolver.ts b/src/resolvers/cargoBikeResolver.ts
index e6e067e..0d56bb9 100644
--- a/src/resolvers/cargoBikeResolver.ts
+++ b/src/resolvers/cargoBikeResolver.ts
@@ -215,7 +215,7 @@ export default {
         },
         related (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadParticipant)) {
-                return dataSources.cargoBikeAPI.relatedByBikeEventId(parent.workshopTypeId);
+                return dataSources.cargoBikeAPI.relatedByBikeEventId(parent.id);
             } else {
                 throw new PermissionError();
             }