composer remove guzzlehttp/guzzle 6.3.0

[labone@server5 ~]$ composer remove remove guzzlehttp/guzzle 6.3.0
remove is not required in your composer.json and has not been removed
guzzlehttp/guzzle is not required in your composer.json and has not been removed
6.3.0 is not required in your composer.json and has not been removed
Package "remove" listed for update is not installed. Ignoring.
Package "6.3.0" listed for update is not installed. Ignoring.
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Generating autoload files
[labone@server5 ~]$

[labone@server5 ~]$ composer require zzantares/proxmoxve ~3.0
Using version ^3.0 for zzantares/proxmoxve
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for zzantares/proxmoxve ^3.0 -> satisfiable by zzantares/proxmoxve[v3.0.0].
    - Conclusion: remove guzzlehttp/guzzle 6.3.0
    - Conclusion: don't install guzzlehttp/guzzle 6.3.0
    - zzantares/proxmoxve v3.0.0 requires guzzlehttp/guzzle ~4.0 -> satisfiable by guzzlehttp/guzzle[4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.6, 4.1.7, 4.1.8, 4.2.0, 4.2.1, 4.2.2, 4.2.3, 4.2.4].
    - Can only install one of: guzzlehttp/guzzle[4.0.0, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.0.1, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.0.2, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.0, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.1, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.2, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.3, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.4, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.5, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.6, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.7, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.1.8, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.2.0, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.2.1, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.2.2, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.2.3, 6.3.0].
    - Can only install one of: guzzlehttp/guzzle[4.2.4, 6.3.0].
    - Installation request for guzzlehttp/guzzle (locked at 6.3.0) -> satisfiable by guzzlehttp/guzzle[6.3.0].


Installation failed, reverting ./composer.json to its original content.
[labone@server5 ~]$