The sudarshana chakra didnt exist

 The mahabharata mentions about sudarshana chakra of krishna,and how as he used on some occasions.
THe sudarshana chakra doesnt exist.Its a later addition to make make krishna god.The first instance is that of slaying shishupala where krishna uses sudarshana chakra.What happened was a battle between krishna and sishupala and after hours of fighting krishna managed to slay sishupala.Sishupala was not somebody who could be killed easily.There are some books written by some poets about the battle between krishna,sishupala.
Krishna,sishupala have enemity for a long time.Krishna's plans for yadava kingdoms were opposed by sishupala.Krishna adviced  the pandavas to conduct the Rajasuya Yaga,and subdue all kings,so it will eliminate his enemies.So that the yadavas will be safe and can prosper.He became the political advisor to the pandavas,and also adviced them on other matters.Sishupala didnt like this.So when the rajasuya yaga was started,he along with some kings had a plan to attack krishna and kill him.So he started abusing Krishna and challenged him to a fight.The other kings also supported him.Krishna,sishupala came outside and  mounted on a chariot and started fighting.Sishupala strikes krishna with many arrows,and so does krishna.
After some hours of fighting,krishna manages to slay sishupala.This battle is detailedly written by some poets in some books.Later on this was changed to Krishna killing sishupala with the sudarshana chakra.THis was done after Krishna was made god by pro pandava writers of mahabharata.
The second instance where krishna used the sudarshana chakra is when he attacked Bhishma in the mahabharata war,when Bhishma was causing widespread destruction,and Arjuna was not able to stop it.Although the mahabharata depicts that krishna used a chariot wheel instead of a chakra,but this is written in some other books.
The third time is when he uses the  sudarshan chakra to eclipse the sun,so that Jayadratha could come out and Arjuna could kill him.The original mahabharata says that krishna used maya instead of sudarshan chakra.
So its clear the the sudarshana chakra didnt exist,and it is later addition by people who waned to make krishna god.