Issue
After any language plugin is enabled, the system will import the Message (sys_ui_message), translated text (sys_ui_translated_text) etc tables record for that particular language. It can be observed that the import of sys_ui_message is showing errors similar to the below under the Import Set Runs:
Error during insert of sys_ui_message (null)
Cause
Often the language install will complete with some errors. This can be due to a number of reasons such as the customer added a translation already. You can verify the errors in the transform error log. The most common error is:
"Error during insert of sys_ui_message (null)" which is of no concern whatsoever. This is the transform map trying to insert a "null" message it read off of our translation source files.
The errors could also happen due to the length of each record or its own duplications.
Resolution
These errors are known errors that usually do not cause any problem.
