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 ('9e60af0a3ef0cd8d7f570719fe7aa32f', -1, 1713984515, 1713984515, '038f04b5', -6, 0, 0)

Line : 187
File : sessions.php