Gondukin,
yes, daft indeed.
I believe it to be nothing more than an EASA drafting cockup.
Clarification that entire PPL(A) could be done on TMG was a bit of an afterthought; I think this bit was simply missed.
Suggestion: ask the CAA.
Use the entire PPL(A) on TMG as a precedent (FCL.210.A(a)),
request that they are happy for you similarly do the conversion on TMG (FCL.210.A(b))
References are from the 'Aircrew Regulation': Commission Regulation (EU) No 1178/2011. amended up to M5.
Please, please, let us know how you get on.