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 ('2bd7f56a1d20bc9496ce02954637ca5a', -1, 1527441395, 1527441395, '36514e87', -4, 0, 0)

Line : 187
File : sessions.php