Can't install in Ember 6, conflicting @ember/test-helpers versions

[DirkLachowski]

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: store-admin@0.0.0
npm ERR! Found: @ember/test-helpers@4.0.4
npm ERR! node_modules/@ember/test-helpers
npm ERR!   dev @ember/test-helpers@"^4.0.4" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer @ember/test-helpers@"^3.0.0" from ember-promise-modals@5.0.0
npm ERR! node_modules/ember-promise-modals
npm ERR!   dev ember-promise-modals@"^5.0.0" from the root project
npm ERR!