it was very easy, just go to:
1. phpmyadmin
2. go to your data table my case was fastcellular
3. on the right side says filters and then containing the word: here type this reservation and then a table is going to come up (name of table is: inventory reservation),
4. if nothing pop up when you type this, then change the page number, right on the top where you type,
5. click on that table and then you will see a lot of tables
6. just delete them all or one by one and you will see that it change right away and you dont have to play with terminal or clean cache.
7. all done, nothing else to do.
