phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8a61c87c88b425d7ddfaa26acb26a47f' 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 ('8a61c87c88b425d7ddfaa26acb26a47f', -1, 1768210382, 1768210382, 'd849d887', 7, 0, 0)

Line : 187
File : sessions.php