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 ('31f4c23ff0c2ef6fc00eedb10c52d443', -1, 1714079775, 1714079775, '0386765f', -4, 0, 0)

Line : 187
File : sessions.php