This error pop-up message means that, more than one user is trying to update the record in GIMS, where the system will lock it until the process is finished.
Please follow below steps to resolve the issue:
Step 1 - Log off from GIMS.
Step 2 - Please wait 10-15 minutes.
Step 3 - login to the GIMS and try again.
If you have any difficulties, do let us know on the ticket and we will assist accordingly.