This is a accidental error which should be withdrawn.
文獻通考
六書存

The character may be an error, but the Wuyingdian edition of 《宋史》 is an important source text which needs to be representable as a digital text. An internet search finds many websites which quote the text "副使安化郎将摩君明稽<田思>等十四人来贡" with UK-20480 represented as <田思> (e.g. here amd here). As such, we can consider that "⿰田思" is a stable error, and should be encoded for the convenience of users. Therefore we are not willing to withdraw this character.

▲ 宋史（明成化朱英刊本）列傳248 folio 11b


▲ 宋史（朝鮮刊本）列傳248 folio 14b


▲ 宋史（中華書局，1974）pp. 14086

The current 宋會要 version (extracted from 永樂大典) gives ⿰口思:


▲ 宋會要（吳興嘉葉堂抄本）454冊

So it is probable that ⿰田思 is error of ⿰口思. But given that the form ⿰田思 have been stable across different 宋史 versions. I suggest to encode it as-is.

00538

口 30.9.2

UK-20694

TS 12 · IDS ⿰口思