1652- Heir and creditor?

This concerns a deed from 31 Dec 1652 which states Adriaen W van der Chijs is testator and Arent van Straten and Maria Willemsdr (van Kittensteyn- his wife?) as 'heirs'. (2 pages long, page 2 attached to next post).

However there's another deed also from 31 Dec 1652 featuring Adriaen van der Chijs (or Ghijs?) as 'debtor' and Arent van Straten as 'Creditor". see URL below;-

https://hdl.handle.net/21.12115/NL-DtAD183689999

I assume the 2 deeds are connected but don't understand how?

 Any explanations about what these deeds cover would be appreciated.

With many thanks as always.

Anne