banner_tracks duplicate entry

[sandomatyas]

There is a site which have SQL errors, like:
500 - Duplicate entry '2019-05-22 01:52:38-1-2' for key PRIMARY
If I'm right this is for table #__banner_tracks
Is it posible that there is a scenario like this:
- visitor1
- Joomla checks the entries with the key: no result
- visitor2
- Koomla checks the entries for visitor2 and inserts the record
- Joomla tries to insert the record for visitor1 after visitor2 and can't do that

How should I handle this?