phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '858e3c47e140423d3c60ab33f4b4d39f' 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 ('858e3c47e140423d3c60ab33f4b4d39f', -1, 1767960806, 1767960806, 'd849d887', 55, 0, 0)

Line : 187
File : sessions.php