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 ('83091dea0cf8db03539dd356e3613c29', -1, 1711718249, 1711718249, '36d2e072', 3, 0, 0)

Line : 187
File : sessions.php