Could Not Reserve Record Keep Trying
We have done all the steps below
This error usually happens when trying to save a change and that record is in a locked status, usually the very user trying to make the change.
These steps may resolve the problem:
1)Refresh the form using the "Clear" icon (looks like a pencil erasing on a piece of paper).
2)Re-query the desired record.
3)Save
4)Change the status
There is no lock at application level or database either.