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 ('1ead81e63b77b8c9eff8ad365c5640fd', -1, 1713482700, 1713482700, '12ddef94', -4, 0, 0)

Line : 187
File : sessions.php