phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8c673d1a7867764b759db0a7786cbf65' 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) VALUES ('8c673d1a7867764b759db0a7786cbf65', -1, 1789787915, 1789787915, 'd849d9af', 2, 0, 0)

Line : 187
File : sessions.php