Use if not exists when creating indexes

[Rustin170506]

Bug Report

• I have searched the issues of this repository and believe that this is not a duplicate.

Related link

None

Steps to reproduce(Optional)

After the first failed sync, starting a full-domain sync again will fail at index creation.

What is expected?

Synchronization can be done, using if not exists when creating the index.

What is actually happening?

[ti-chi-bot]

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/lifecycle stale

[ti-chi-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
If this issue is safe to close now please do so with /close.
Send feedback to sig-community-infra or Mini256.
/lifecycle rotten