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 ('3de670992335b4f77933d5a2945a4aa8', -1, 1730418651, 1730418651, '038ff732', -1280, 0, 0)

Line : 195
File : sessions.php