CfnInsightRule and TagManager: Duplicate tag key/value pair leads to INVALID_TAG issue

[neilzhao-aws]

Describe the bug

Following the thread of #20103 but with more evidence.
Digging into CloudTrail, the INVALID_TAG from CfnInsightRules are caused by duplicate key/value pairs.
One of the Tags KeyValue pair is duplicated in the PutInsightRule CloudTrail event.
The CDK changeset shows the key/value pair isn't duplicated

Expected Behavior

CfnInsightRule generated PutInsightRule should not duplicate tags.

Current Behavior

CfnInsightRule generated PutInsightRule should one duplicate tags.

Reproduction Steps

create multiple tags on the stack level.

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.132.0

Framework Version

No response

Node.js Version

18.19.1

OS

Linux

Language

TypeScript

Language Version

4.9.5

Other information

I don't think the bug is related to CDk. the cloudformation output is correct.
However, the PutInsightRule action taken by the cdk has an extra duplicated tag, leading to the issue.

[pahud]

Reproduction Steps
create multiple tags on the stack level.

Can you share the minimal code snippets that reproduces this bug?

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[aws-cdk-automation]

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