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 ('377e57c0be8531af312bd8576ecb8a47', -1, 1511461548, 1511461548, '3650e3bd', -1, 0, 0)

Line : 187
File : sessions.php