When import sets from two different data sources are using same staging table, only latest one is used during transformDescription<!-- div.margin { padding: 10px 40px 40px 30px; } table.tocTable { border: 1px solid; border-color: #e0e0e0; background-color: #fff; } .title { color: #d1232b; font-weight: normal; font-size: 28px; } h1 { color: #d1232b; font-weight: normal; font-size: 21px; margin-bottom: 5px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #cccccc; } h2 { color: #646464; font-weight: bold; font-size: 18px; } h3 { color: #000000; font-weight: bold; font-size: 16px; } h4 { color: #666666; font-weight: bold; font-size: 15px; } h5 { color: #000000; font-weight: bold; font-size: 13px; } h6 { color: #000000; font-weight: bold; font-size:14px; } ul, ol { margin-left: 0; list-style-position: outside; } --> Symptoms When we try to import data into a staging table using xls import using 2 different data sources it will create 2 different import sets(Importset1 and Importset2). After we transforming the data using the 2 different transform map at the same time from 2 different browsers, both these transform maps processing only the latest import set(importset2). Importset1 status is showing always loaded. Release All Releases Cause Even though we used 2 different transform maps to transform the 2 import sets, Transform maps always use the latest import set to process because both the import sets are stored in the same import set table. Resolution Use 2 different import set tables to import data and process the data using the transform mapIf we import data into single import set table, if we want to transform both the import sets while transforming the data select import set you want to transform Additional Information Please refer Transform map documentation : https://docs.servicenow.com/csh?topicname=c_CreatingNewTransformMaps.html&version=latest