phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9b44d95eb67642f63e3dac839e054d3a' 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 ('9b44d95eb67642f63e3dac839e054d3a', -1, 1768504853, 1768504853, 'd849d86d', -4, 0, 0)

Line : 187
File : sessions.php