phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a1fa66bde2e41387f84ee6459fe00757', -1, 1713456674, 1713456674, '038ec78a', -10, 0, 0)

Line : 187
File : sessions.php