Warning: session_start(): Failed to decode session object. Session has been destroyed

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Hi, when I open some backoffice product page the pages appear white with the 500 error. In debug mode show this:

 

Warning: session_start(): Failed to decode session object. Session has been destroyed

in vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php (line 145)

 

I am ussing Prestashop 1.7.6.9 and php version: 7.2

 

I do not know what is happening. I need help