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 ('8b4a40e8cd7f77f0fed06b2f466170eb', -1, 1490905263, 1490905263, '36cd8d04', 30, 0, 0)

Line : 189
File : sessions.php