phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '5c6ef7857946b875a24daea5607f4d1d' 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 ('5c6ef7857946b875a24daea5607f4d1d', -1, 1770213392, 1770213392, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php