Help me make a correction

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My name is Guy Rocca. I am very frustrated because some one changed my great Grandmother and I can't make a correction.
Ida Powers L8Q1-LJK is not my great grandmother, Estelle M Laddison M5QS-359 is.
Estelle M Laddison died 25 January 1895 as a result of complications from the birth of my grandmother Sarah Estella Robinson
L8Q1-LV8 12 January 1895.
I don't know who is making this change but it also showed up on Ancestry.com.
My grandmother told me about the death of her mother.
Please make a correction or tell me how to do it.
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Estelle M Laddison M5QS-3S9 (note S, not 5 as the next-to-last character) is still attached to Sarah Estella Robinson as a mother. It looks like Ida was her father's second wife, i.e. Sarah's stepmother. You can change the relationship type to "step" by going to Sarah's details page, scrolling down to the Family Members section, and clicking the pencil (edit) button next to Sarah's name where she appears under Joshua and Ida.
On the resulting popup, click "add relationship type" in the Mother section and then choose Step from the drop-down.
If you determine that Ida is not in fact Sarah's stepmother, then you can remove the relationship. In the Edit Parents popup, click "remove or replace" in the Child section. On the next popup, click the "I have reviewed" box and click "remove parents". On the next popup, write a reason for the change and click Remove. This will detach Sarah from Ida, but Joshua will still have Ida as another wife.
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