phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4c6dce52e7d0114977c91ee1a4aad3fd' 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 ('4c6dce52e7d0114977c91ee1a4aad3fd', -1, 1765953919, 1765953919, 'd849d816', -4, 0, 0)

Line : 187
File : sessions.php