Fix check of existing index

[julioxavierr]

Problem

Describe the purpose of this change. What problem is being solved and why?

It currently tries to create a new index even if the index already exists

Solution

Describe the approach you took. Link to any relevant bugs, issues, docs, or other resources.

Changed the function used to check if the index already exists

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: (explain here)

Test Plan

Describe specific steps for validating this change.

• Try to run the load script using an index that already exists

[dhurlburtusa]

It would be great to get this merged so that potential customers don't shy away from broken examples.