# 2774 Posting Changes to a Row After a Transaction Commit/Rollback Can Cause Row Unlock Error

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I tested almost all possible sequences using Edit, Post, StartTransaction and Commit and some of them generate an exception:

"ElevateDB Error #1006 Cannot unlock the row in the table ..."

The problematic sequences are:
- StartTransaction; Edit; Post ; Edit; Commit; Post;
- Edit; StartTransaction; Post ; Edit; Commit; Post;

If you replace Commit with Rollback and/or Post with Cancel the problem is the same.