Why did justanian I want to reorganize roman laws into a new group of rules?

Answer: Justinian wanted to modernize Roman law and resolve any issues at stake.

Explanation:

The law of Emperor Justinian, apart from the elements on which he insisted on being involved, is a revision of the ancient Roman laws. As time passed the empire established some new institutions for which there were no specific laws.

To sort out the bureaucracy and administrative apparatus, Justinian began drafting the legislation. Also, some rules have become outdated over time and have been rewritten, which is why they have been amended. For this reason, Justinian wanted to draft a law that would be constant.