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 ('24e2a72de13c2a8cadf3096490a0e2be', -1, 1713857016, 1713857016, '12d82074', 6, 0, 0)

Line : 187
File : sessions.php