diff --git a/awx/api/views/__init__.py b/awx/api/views/__init__.py
index 146eff930b..e1af329953 100644
--- a/awx/api/views/__init__.py
+++ b/awx/api/views/__init__.py
@@ -3172,8 +3172,8 @@ class JobTemplateCredentialsList(SubListCreateAttachDetachAPIView):
 
     def is_valid_relation(self, parent, sub, created=False):
         if sub.unique_hash() in [cred.unique_hash() for cred in parent.credentials.all()]:
-            return {"error": _("Cannot assign multiple {credential_type} credentials.".format(
-                credential_type=sub.unique_hash(display=True)))}
+            return {"error": _("Cannot assign multiple {credential_type} credentials.").format(
+                credential_type=sub.unique_hash(display=True))}
         kind = sub.credential_type.kind
         if kind not in ('ssh', 'vault', 'cloud', 'net'):
             return {'error': _('Cannot assign a Credential of kind `{}`.').format(kind)}