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 ('04ee0411e0e460b7d10f9493cbedac25', -1, 1713908607, 1713908607, '0390bdb1', 5, 0, 0)

Line : 187
File : sessions.php