phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b4b2e2a3a77fa68bb072fc6759814ed6', -1, 1506054529, 1506054529, '36c6a54a', 18, 0, 0)

Line : 187
File : sessions.php