diff --git a/api-reference/error-codes.mdx b/api-reference/error-codes.mdx
index 570dd0f..2accc6e 100644
--- a/api-reference/error-codes.mdx
+++ b/api-reference/error-codes.mdx
@@ -198,6 +198,7 @@ A conflict response also contains `current_state`. Some errors contain `user_mes
 | <span id="UZ-PROVIDER-008"></span>`UZ-PROVIDER-008` | 409 | Library model already exists | That model is already in the library. Edit the existing entry instead of adding a duplicate. | Configure a supported provider, model, and secret. |
 | <span id="UZ-PROVIDER-009"></span>`UZ-PROVIDER-009` | 500 | Platform model key not configured | Platform defaults aren't set up on this deployment yet. Keep your current provider for now, or contact support. | Configure a supported provider, model, and secret. |
 | <span id="UZ-PROVIDER-010"></span>`UZ-PROVIDER-010` | 500 | Tenant has no primary workspace | Something's off with your account setup. Contact support with the request id below. | Configure a supported provider, model, and secret. |
+| <span id="UZ-PROVIDER-011"></span>`UZ-PROVIDER-011` | 400 | Source workspace not found | That workspace doesn't exist. Pick one from your workspace list and try again. | Configure a supported provider, model, and secret. |
 
 ### Tenant models