diff --git a/src/api/services/precomputed/precomputed.js b/src/api/services/precomputed/precomputed.js
index df1a8a9ac3..2291e0f606 100644
--- a/src/api/services/precomputed/precomputed.js
+++ b/src/api/services/precomputed/precomputed.js
@@ -1,3 +1,5 @@
+//TODO - Precomputing Task will be coded in next card
+
 import ezs from '@ezs/core';
 import progress from '../progress';
 import localConfig from '../../../../config.json';
@@ -44,20 +46,19 @@ export const getPrecomputedDataPreview = async ctx => {
         throw new Error(`Missing parameters`);
     }
 
-    const commands = null;
     const excerptLines = await ctx.dataset.getExcerpt(
-        sourceColumns ? { [sourceColumns]: { $ne: null } } : {},
+        sourceColumns && sourceColumns.length
+            ? { [sourceColumns[0]]: { $ne: null } }
+            : {},
     );
     let result = [];
     try {
         for (let index = 0; index < excerptLines.length; index += BATCH_SIZE) {
-            let values = await processEzsEnrichment(
-                excerptLines.slice(index, index + BATCH_SIZE),
-                commands,
-                ctx,
-                true,
-            );
-            result.push(...values.map(v => v.value));
+            const entry = {};
+            sourceColumns.map(column => {
+                entry[column] = excerptLines[index][column];
+            });
+            result.push(entry);
         }
     } catch (error) {
         const logger = getLogger(ctx.tenant);
diff --git a/src/api/workers/precomputer.js b/src/api/workers/precomputer.js
index 482d5d1964..26b7d012f6 100644
--- a/src/api/workers/precomputer.js
+++ b/src/api/workers/precomputer.js
@@ -1,3 +1,5 @@
+//TODO - Precomputing Task will be coded in next card
+
 import { CancelWorkerError } from '.';
 import {
     startEnrichment,
diff --git a/src/app/js/admin/precomputed/PrecomputedPreview.js b/src/app/js/admin/precomputed/PrecomputedPreview.js
index bcd2ffb5cb..ee425dddbe 100644
--- a/src/app/js/admin/precomputed/PrecomputedPreview.js
+++ b/src/app/js/admin/precomputed/PrecomputedPreview.js
@@ -31,7 +31,9 @@ const PrecomputedPreview = ({ lines, sourceColumns, p: polyglot }) => {
             </Box>
 
             <Box textAlign={'center'} mb={2}>
-                <Typography variant="body1">{sourceColumns}</Typography>
+                <Typography variant="body1">
+                    {sourceColumns && sourceColumns.join(' | ')}
+                </Typography>
             </Box>
             <Box mb={4}>
                 {lines.length > 0 &&
@@ -47,7 +49,7 @@ const PrecomputedPreview = ({ lines, sourceColumns, p: polyglot }) => {
                                 }}
                                 title={JSON.stringify(line)}
                             >
-                                {JSON.stringify(line)}
+                                {Object.values(line).join(' | ')}
                             </Typography>
                         </Box>
                     ))}