Can Ijma Be Erased Or Altered?
Yes, it is possible that a Mutawatar injunction gets lost with the passage of time, as it happend in the cases of Jews and Christians that they lost the the propher mehtod of saying of prayers and other injucntions. But it did not happend to Muslims. The example you gave is not appropriate here. Panting was never a Mutawatar injunction. It was reported in Ahadith and was an apllication of the principle as you rightly put, to prohibite polytheistic illustrations.
@irfan76 and sir did the procedure i mentioned above was correct? That since ahadith cannot have an independent injuction, so independent prohibition of painting cannot be taken through that Hadith, so the only thing left is to relate it with some prohibition already stated in Quran or Sunnah and hence we reach evident conclusion that it’s because of violation of tawheed