list has no rows for assignment to sobject salesforce apex

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1. Error: List Has No Rows For Assignment to SObject When Attempting to Edit Configuration Settings

   

2. apex

   

3. apex

   

4. Understanding 'List has no rows for assignment to SObject' in a trigger creating new record on

   

5. Salesforce: List has no rows for assignment to SObject test class

   

6. Getting "System.QueryException: List has no rows for assignment to SObject" error with custom