i can't install iTunes, it keep asking me to upgrade to catalina when in fact i am already using big sur

it keep asking me to upgrade to catalina when in fact i am already using big sur

I am using the following system

Hardware Overview:

  Model Name: MacBook Pro

  Model Identifier: MacBookPro11,4

  Processor Name: Quad-Core Intel Core i7

  Processor Speed: 2.2 GHz

  Number of Processors: 1

  Total Number of Cores: 4

  L2 Cache (per Core): 256 KB

  L3 Cache: 6 MB