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 ('f9a03f15b21842db2273e88b20f90550', -1, 1713589231, 1713589231, '2cd463d0', -7, 0, 0)

Line : 187
File : sessions.php