phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7f49437d1da69397e2c601c8bfe3f9f2', -1, 1715104084, 1715104084, '12e0d6d7', -4, 0, 0)

Line : 189
File : sessions.php