[Koha] Suddenly can't check in items

[Michael Kuhn]

Hi

 > I tried to check in two items but I got this message:
 > 
<http://koha.1045719.n5.nabble.com/file/t341197/Annotation_2019-07-24_103134.png>
 >
 > I used to check in items without any problem.

Just follow the advice given in the screenshot. Everything is described 
under https://wiki.koha-community.org/wiki/DBMS_auto_increment_fix

Best wishes: Michael
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