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 ('a961d29b7df7f7b2ad544d039df01de2', -1, 1508595013, 1508595013, '36a269f1', -2, 0, 0)

Line : 187
File : sessions.php