Querying the Sys Schema innodb_buffer_stats_by_schema view returns warnings

SELECT * FROM sys.innodb_buffer_stats_by_schema\G

*************************** 1. row ***************************

object_schema: InnoDB System

    allocated: 160.00 KiB

         data: 4.77 KiB

        pages: 10

 pages_hashed: 10

    pages_old: 10

  rows_cached: 16

*************************** 2. row ***************************

object_schema: mysql

    allocated: 48.00 KiB

         data: 457 bytes

        pages: 3

 pages_hashed: 3

    pages_old: 3

  rows_cached: 5

2 rows in set, 2 warnings (0.036 sec)

SHOW WARNINGS;

+---------+------+------------------------------------------+

| Level   | Code | Message                                  |

+---------+------+------------------------------------------+

| Warning | 1292 | Truncated incorrect DECIMAL value: 'YES' |

| Warning | 1292 | Truncated incorrect DECIMAL value: 'YES' |

+---------+------+------------------------------------------+