phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b70c725bc014775c8fc7e5e0a35984b5' 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 ('b70c725bc014775c8fc7e5e0a35984b5', -1, 1768011661, 1768011661, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php