diff --git a/awx/main/models/unified_jobs.py b/awx/main/models/unified_jobs.py
index bd254fc182..40132dc2ab 100644
--- a/awx/main/models/unified_jobs.py
+++ b/awx/main/models/unified_jobs.py
@@ -1345,15 +1345,17 @@ class UnifiedJob(
 
         # verify that any associated credentials aren't missing required field data
         missing_credential_inputs = []
+        credential_name = ""
         for credential in self.credentials.all():
             defined_fields = credential.credential_type.defined_fields
             for required in credential.credential_type.inputs.get('required', []):
                 if required in defined_fields and not credential.has_input(required):
                     missing_credential_inputs.append(required)
+                    credential_name = credential.name
 
         if missing_credential_inputs:
             self.job_explanation = '{} cannot start because Credential {} does not provide one or more required fields ({}).'.format(
-                self._meta.verbose_name.title(), credential.name, ', '.join(sorted(missing_credential_inputs))
+                self._meta.verbose_name.title(), credential_name, ', '.join(sorted(missing_credential_inputs))
             )
             self.save(update_fields=['job_explanation'])
             return (False, None)