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I am creating extensionpool handlers to save data in multiple tables.

There are total 3 tables :

1 : Sliders

2 : SliderItems

3 : SliderSelectedItems

When I create/update Slider, list of selected slider items displays in TAB like this

I can see which slides are assigned to a slider.
Also when I check/uncheck the slider items, record is added to SliderSelectedItems table, which stores only item_id and slider_id.

Now, When I create/update slider items, I can choose multiple slider in which this item will be displayed. Like this,

When I save this, record is added to SliderSelectedItems

To add records in SliderSelectedItems, I have created extensionpool Handlers

<type name="MagentoFrameworkEntityManagerOperationExtensionPool">

    <arguments>

        <argument name="extensionActions" xsi:type="array">

            <item name="MageSparkOwlCarouselSliderApiDataSliderInterface" xsi:type="array">

                <item name="read" xsi:type="array">

                    <item name="sliderReader" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderRelationReadHandler</item>

                    <item name="sliderItemReader" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderItemRelationReadHandler</item>

                </item>

                <item name="create" xsi:type="array">

                    <item name="sliderCreator" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderRelationSaveHandler</item>

                    <item name="sliderItemCreator" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderItemRelationSaveHandler</item>

                </item>

                <item name="update" xsi:type="array">

                    <item name="sliderUpdater" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderRelationSaveHandler</item>

                    <item name="sliderItemUpdater" xsi:type="string">MageSparkOwlCarouselSliderModelResourceModelSliderItemRelationSaveHandler</item>

                </item>

            </item>

        </argument>

    </arguments>

</type>

Now, when I am saving the slider, it works fine.
But when I save the slider item, SAVE HANDLER of SLIDER is called.
It conflicts my slider item save/read handler.

I am confused, any help would be appriciated.
Thank you.