iPhone 7 won't update to 14.5.1
My iPhone 7 is saying software update 14.5.1 is available, but I can't get it to download. The software version that is currently on my iPhone is version 12.3.1. I have 4.94 GB of space available so storage is not the problem. I have also tried restarting my phone and I have it connected to a power source while trying to update it. It seems to go thru the download process but when it gets to the end it says "unable to install update, an error occurred while installing IOS 14.5.1" Then I go into my storage and it shows that it is installed and is using 3.44 GB of space, yet my phone is still operating with software version 12.3.1
Any ideas on how to get it to update would be much appreciated!
iPhone 7