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 ('0f335c1a5818895c6f7fca9ee08f2b89', -1, 1713576664, 1713576664, '03919cfa', -7, 0, 0)

Line : 187
File : sessions.php