phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8136f134aaddde1964e7c50c9bd3f6c2' 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 ('8136f134aaddde1964e7c50c9bd3f6c2', -1, 1762219019, 1762219019, 'd849d887', -9, 0, 0)

Line : 187
File : sessions.php