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 ('1b747dbf6474f0582047a2a6c472f4a3', -1, 1713590084, 1713590084, '039071c5', 0, 0, 0)

Line : 187
File : sessions.php