Table maintenance generator is not updating existing entries, even after showing changes saved msg.

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I have problem with my TMG, i create TMG for Ztable, it working fine in development system, but it didn't work in quality system. Problem is, it show up that the data have been saved but when i reopen TMG and look into table in se16, there are no changes. i already look for the same issue in SAP forum, but there are no answer for my problem.

My problem key :

1. I have created TMG using SM30
2. I didn't create TCODE for it

3. I didnt make any event, just TMG from SE11

4. It worked in Development system, but it didn't work in quality system

My action so far:

1.I already destroy my previous TMG and create the new one, but still didnt change anything.

Image for my problem:

*Changes that i made, change value from X to blank