Creating account deployment is not supported by the model 'text

I am facing same issue as well - CannotChangeDeploymentModel: The model of deployment cannot be changed.

Within the Azure portal, navigate to the OpenAI resource that was deployed as part of this sample code. From the left hand blade navigate to Model Deployments > Management Deployments. Select 'Deployments' in the blade and then delete deployment with the name 'davinci' from the Deployment name column. If you have pulled the latest which includes https://github.com/Azure-Samples/azure-search-openai-demo/pull/389/files then you can re-run: azd up successfully.