phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1ac253e8ad5712aed9dcdb0f874a26a6' 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 ('1ac253e8ad5712aed9dcdb0f874a26a6', -1, 1767114598, 1767114598, 'd849d819', 3, 0, 0)

Line : 187
File : sessions.php