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 ('d46a0c9d1f6cf97223662eadf33641bd', -1, 1711697319, 1711697319, '3417c991', 4, 0, 0)

Line : 187
File : sessions.php