phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ac7b5aa0c352ca67a7cc7b9bc3c015f6' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ac7b5aa0c352ca67a7cc7b9bc3c015f6', -1, 1768006326, 1768006326, '0aff0001', 113, 0, 0)

Line : 199
File : sessions.php