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 ('8ee2f730a0dc077a4a20a0361289d23c', -1, 1730418799, 1730418799, '038d2d1d', -9, 0, 0)

Line : 195
File : sessions.php