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 ('791dda2f7b1187a2bdf024d69ec3e37a', -1, 1505917815, 1505917815, '369015c3', 14, 0, 0)

Line : 187
File : sessions.php