Error Code 48 in MongoDB typically indicates that you are attempting to create a collection that already exists.

This can happen when the application tries to register a Mongoose model multiple times.

I have checked the documentation for Mongoose using this link and used dropCollection, similar to your approach.

However, from the documentation, there is an official method to drop a collection.

It is advisable to use the mongodb package to drop the collection. Refer to this GitHub repository for the complete code in JavaScript.

I referred to this document to create, drop, and retrieve a collection in Azure Cosmos DB for MongoDB.

const  indexes = await  collection.indexes();
console.log(`Indexes on collection:\n${JSON.stringify(indexes, null, 2)}`);
const  dropCollectionResult = await  db.dropCollection(collectionName);
console.log(`Collection dropped: ${dropCollectionResult}`);
} catch (error) {
console.error("Error connecting to Azure Cosmos DB:", (error  as  Error).message);

Output: