컬렉션 데이터베이스 생성시 오류

강의를 같이 따라하면서 Mystacks.ts 소스를 따라하였으나,

✖ Errors

API UPDATE_ROLLBACK_COMPLETE

Collections/Table: Resource handler returned message: "Resource of type 'AWS::DynamoDB::Table' with identifier 'dev-seoeun-AI-demo-Collections' already exists." (RequestToken: d55126dc-f6ce-0fd2-9b78-f31a1eba2f64, HandlerErrorCode: AlreadyExists)
위와 같은 오류가 나오면서 계속 빌드가 실패하였습니다.

그리고 lambda.ts까지 강의내용 모두 따라한 후, 포스트맨으로 호출해보니

Collections/Table: Resource handler returned message: "Resource of type 'AWS::DynamoDB::Table' with identifier 'dev-seoeun-AI-demo-Collections' already exists." (RequestToken: 30214b18-df7b-eb76-2b3f-ae80c1c78981, HandlerErrorCode: AlreadyExists)

| Invoked packages/functions/src/lambda.handler

| Error: Cannot use Table.Collections. Please make sure it is bound to this function.

at Object.get (/Users/seoeunjang/seoeun_AI_demo/node_modules/sst/node/util/index.js:28:27)

at handler (/Users/seoeunjang/seoeun_AI_demo/packages/functions/src/lambda.ts:119:34)

at file:///Users/seoeunjang/seoeun_AI_demo/node_modules/sst/support/nodejs-runtime/index.mjs:148:22

at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

위와 같은 오류가 발생하였습니다.
혹시 제가 놓친 부분이 어떤건지 알 수 있을까요? 제가 AWS계정에 추가로 뭘 더 설정해야했던걸까요?