problems with the instalation

[battlealita]

Hi!!!, Im new in symfony and I discover this amazing Bundle but I have a little problem and I don't know very well how can I fix it:
Problem 1
- Root composer.json requires petkopara/crud-generator-bundle dev-master -> satisfiable by petkopara/crud-generator-bundle[dev-master].
- petkopara/crud-generator-bundle dev-master requires doctrine/doctrine-bundle ^1.6 -> found doctrine/doctrine-bundle[1.6.0, ..., 1.12.x-dev] but it conflicts with your root composer.json require (^2.3).

I'm working with Symfony 5

Thank!!!!