phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a6b79a5aa6fefc2bb3d54023a817095f' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a6b79a5aa6fefc2bb3d54023a817095f', -1, 1765404357, 1765404357, 'd849d8da', -4, 0, 0)

Line : 187
File : sessions.php