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 ('bd6af687e49d751d2bce25e10a2d4756', -1, 1511529324, 1511529324, '36c6026e', -4, 0, 0)

Line : 187
File : sessions.php