enable-managed-identity true causes 'ApiManagementServiceResource' object does not support item assignment

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Describe the bug

When running az apim create with --enabled-managed-identity true you get the below error

Command Name az apim create

Errors:

'ApiManagementServiceResource' object does not support item assignment
Traceback (most recent call last):
Temp\pip-install-z6h9b3s8\knack\knack\cli.py, ln 215, in invoke
azure\cli\core\commands\__init__.py, ln 631, in execute
azure\cli\core\commands\__init__.py, ln 695, in _run_jobs_serially
azure\cli\core\commands\__init__.py, ln 688, in _run_job
Local\Temp\pip-install-z6h9b3s8\six\six.py, ln 703, in reraise
azure\cli\core\commands\__init__.py, ln 665, in _run_job
azure\cli\core\commands\__init__.py, ln 324, in __call__
azure-cli-core\azure\cli\core\__init__.py, ln 574, in default_command_handler
azure\cli\command_modules\apim\custom.py, ln 31, in create_apim
TypeError: 'ApiManagementServiceResource' object does not support item assignment

To Reproduce:

Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

• Put any pre-requisite steps here…
• az apim create --name "any" --publisher-email "[e-mail]" --publisher-name "any" -g "any" --enable-managed-identity true

Expected Behavior

Should deploy a new APIM instance

NOTE: Using az apim update --enable-managed-identity true ... doesn’t return error

Environment Summary

Windows-10-10.0.18362-SP0
Python 3.6.6
Installer: MSI

azure-cli 2.4.0 *

Additional Context

[sireza]

Just experienced the same issue, would appreciate an update on this. Thanks

[jt000]

@navba-MSFT, You are correct, I no long am able to reproduce this issue. Thanks!