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 ('a0976d549e7be39e4f13dc1338e22509', -1, 1713580199, 1713580199, '12dca0d8', 3, 0, 0)

Line : 187
File : sessions.php