phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6311b7b16c31b13f8f9aa34c773136a6' 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 ('6311b7b16c31b13f8f9aa34c773136a6', -1, 1762172144, 1762172144, 'd849d887', -9, 0, 0)

Line : 187
File : sessions.php