A word ending with sixth case-affix is not compounded with a word ending with the affix kta , when the force of kta is to denote 'respect' etc.,
The affix क्त is added in the sense of inclination, understanding or respect by sutra 3.2.188. The present sutra alludes to that aphorism when it uses the word पूजाः and puja itself is used only as an illustration and includes the other two significations of 'kta' also, namely mati 'inclination,' and buddhi 'understanding.'
As राज्ञां मतः -बुद्धः - पूजितः 'the king wishes, understands or respects.'
Why do we say 'when meaning respect'? When 'kta' has not this signification there is compounding. As छात्रहसितं 'pupil's laughing.',