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 ('9fd1a30dd391b3ab31d3b4f97c9c094f', -1, 1713896885, 1713896885, '12742ad0', 6, 0, 0)

Line : 187
File : sessions.php