Merge pull request #281357 from JeffreyWolford/patch-25

Update data-collection-log-text.md

Author: prmerger-automator[bot]

articles/azure-monitor/agents/data-collection-log-text.md

@@ -62,6 +62,11 @@ The incoming stream of data includes the columns in the following table.
 ## Custom table
 Before you can collect log data from a text file, you must create a custom table in your Log Analytics workspace to receive the data. The table schema must match the data you are collecting, or you must add a transformation to ensure that the output schema matches the table. 
 
+>
+> Warning: You shouldn’t use an existing custom log table used by MMA agents. Your MMA agents won't be able to write to the table once the first AMA agent writes to the table. You should create a new table for AMA to use to prevent MMA data loss.
+>
+
+
 For example, you can use the following PowerShell script to create a custom table with `RawData` and `FilePath`. You wouldn't need a transformation for this table because the schema matches the default schema of the incoming stream.