[5] contact error when deleting alias

[alikon]

Pull Request for Issue #41713 .

Summary of Changes

add check for hits

Testing Instructions

Fill new contact under some category
Use "Save"
Use "Save as copy"
In this copy will be end of alias -2
Delete this end "-2" of alias
Save
Result: Save failed with the following error: Another Contact in this category has the same alias.
Delete all in alias line, to automaticaly generate new alias
Save
Result is empty alias(will not generate new one) and an ERROR: Save failed with the following error: Incorrect integer value: '

Actual result BEFORE applying this Pull Request

Result is empty alias(will not generate new one) and an ERROR: Save failed with the following error: Incorrect integer value: '

Expected result AFTER applying this Pull Request

no more error

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[ceford]

I have tested this item ✅ successfully on 873e44d

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[viocassel]

I have tested this item ✅ successfully on 873e44d

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42968.}

[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42968.}

[bembelimen]

Thx