phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ef53f1c62040cd82d74d113dff9474bc' 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, priv_session_id) VALUES ('ef53f1c62040cd82d74d113dff9474bc', -1, 1788824841, 1788824841, '6817c58c', -9, 0, 0, '68b26b3278993cf2a66fce13613d8f79')

Line : 188
File : sessions.php