Error: Previous value was empty problem

[Anugrah (Creator)]

In my project an error message comes from firebase
Error previous value was empty
How to solve this problem

[The_K_Studio (Karan M.)]

Firebase Database | A Guide for Beginners

Hi, Koders! I observed that there were many queries on Firebase Database even me ! but eventually after trials and errors I solved the problem I had posted a solution to a Koder who had the same issue but I thought to make a more comprehensive guide on Firebase for begginers. So lets get started! Lets understand the blocks The below warning is because there is no blocks associated with it. [Firebase Database Data Changed] This is an event triggered when the data changes in firebase, for e…

[Anugrah (Creator)]

The error comes from which block plss mark it to me

[Still-learning (1-2-3-4...)]

When do you get such error? While opening the app or on button click? Or while picking an element

[Anugrah (Creator)]

Send button clicks the error comes