Permissions for system user cannot be created

Overview:
Steps to Reproduce:

1. Run SearchAPI Karate tests on snapshot or testing environment
2. Observe the error message in logs during tenant initialization

   POST request for mod-search-1.6.0-SNAPSHOT.167 /_/tenant failed with 500: {"errors":[{"message":"[403 Forbidden] during [POST] to [http://perms/users] [PermissionsClient#assignPermissionsToUser(Permissions)]: [Cannot update permissions: operating user d9d9582e-66ad-5bd0-b3cb-7db20e7539cc not found]","type":"Forbidden","code":"unknown_error"}],"total_records":1}
   

   Expected Results:
   API tests for mod-search are passed through
   Actual Results:
   Test preparation fails on the request

   POST https://folio-snapshot-okapi.dev.folio.org/_/proxy/tenants/testenant3918264315827287040/install?tenantParameters=loadSample%3Dfalse%2CloadReference%3Dtrue
   request body: [
     {
       "action": "enable",
       "id": "mod-login-7.6.0-SNAPSHOT.108"
     },
     {
       "action": "enable",
       "id": "mod-permissions-6.0.0-SNAPSHOT.127"
     },
     {
       "action": "enable",
       "id": "mod-users-18.2.0-SNAPSHOT.179"
     },
     {
       "action": "enable",
       "id": "mod-inventory-storage-22.1.0-SNAPSHOT.647"
     },
     {
       "action": "enable",
       "id": "mod-search-1.6.0-SNAPSHOT.167"
     }
   ]
   

   Additional Information:
   mod-search creates a system user with the following requests:

   1) Check if system user exists with
   GET {okapi}/users?query=username==mod-search
   
   2) create a system user
   POST {okapi}/users
   body : {"username": "mod-search", "active": true ,"personal": { "lastName": "mod-search" } }
   
   
   3) update user credentials
   POST {okapi}/authn/credentials
   body : {"username": "mod-search", "password": "{password}" }
   
   4) update user permission
   POST {okapi}/perms/users/{userId}/permissions?indexField=userId
   body: {"id": "{randomId}", "userId": "{userId}", "permissions": [{listOfPermissions}]}
   

   the last request (#4) fails with the error above