DB Error: Duplicate entry 'NULL' for key 'sessions_user_

Software Support
1

this messege appear when I try to enter any journal for the following web
www.tu-jo.com
http://main.tu-jo.com/ojs/index.php/PS

regards

2

Hi @Aziz_Ibrahim,

Is “id” missing at the end of the error message you quoted? The sessions_user_id index on the sessions.user_id field should be marked non-unique, allowing duplicates.

Best,
Amanda Stevens
Public Knowledge Project Team