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 ('8752ecc54ef860e62d1adfad6729236e', -1, 1713865425, 1713865425, '03936878', 6, 0, 0)

Line : 187
File : sessions.php