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 ('8afd899d54f50d8380d95e18f02ef9fe', -1, 1425702040, 1425702040, '36a7b3d2', 6, 0, 0)

Line : 186
File : sessions.php