• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

OS version and name: Kubuntu 20.04
Poetry version: 1.1.12

Issue

Hi there! First of all, thank you very much for this tool!

Recently, I have found out a weird behavior to me. However, maybe it poetry works as expected, so please then explain this behavior to me.

The issue is the following. When you add a new dependency to a project using the poetry add command, poetry also updates the versions of other libraries if the updates are available despite that the previous version is recorded in the poetry.lock file. Such behavior to me is unexpected and may lead to bugs in the developed application.