mysqli error when editing product from the admin panel

Hi

I've serious problem with my Opencart 2.2 store
When I'm edit product from the admin panel and save it , I can't change its properties anymore.
When I'm trying to edit the product properties again from the admin panel
The site display error
Warning: mysqli::query(): (21000/1242): Subquery returns more than 1 row in /home/XXX/public_html/system/library/db/mysqli.php on line 18

Please help
Rose ERTINET

Exactly which version of Opencart are you using?

Was it working earlier?

Have you made any change in admin side code?