diff --git a/superset-frontend/src/dashboard/actions/sliceEntities.js b/superset-frontend/src/dashboard/actions/sliceEntities.js
index 69472d9155f54..2a344cbc0655d 100644
--- a/superset-frontend/src/dashboard/actions/sliceEntities.js
+++ b/superset-frontend/src/dashboard/actions/sliceEntities.js
@@ -74,17 +74,15 @@ export function fetchAllSlices(userId) {
           const slices = {};
           json.result.forEach(slice => {
             let form_data = JSON.parse(slice.params);
-            let { datasource } = form_data;
-            if (!datasource) {
-              datasource = getDatasourceParameter(
-                slice.datasource_id,
-                slice.datasource_type,
-              );
-              form_data = {
-                ...form_data,
-                datasource,
-              };
-            }
+            form_data = {
+              ...form_data,
+              // force using datasource stored in relational table prop
+              datasource:
+                getDatasourceParameter(
+                  slice.datasource_id,
+                  slice.datasource_type,
+                ) || form_data.datasource,
+            };
             slices[slice.id] = {
               slice_id: slice.id,
               slice_url: slice.url,
@@ -93,6 +91,8 @@ export function fetchAllSlices(userId) {
               form_data,
               datasource_name: slice.datasource_name_text,
               datasource_url: slice.datasource_url,
+              datasource_id: slice.datasource_id,
+              datasource_type: slice.datasource_type,
               changed_on: new Date(slice.changed_on_utc).getTime(),
               description: slice.description,
               description_markdown: slice.description_markeddown,
diff --git a/superset/charts/commands/importers/v1/__init__.py b/superset/charts/commands/importers/v1/__init__.py
index 4b3f443306b5b..0e2b5b3a8adf7 100644
--- a/superset/charts/commands/importers/v1/__init__.py
+++ b/superset/charts/commands/importers/v1/__init__.py
@@ -25,6 +25,7 @@
 from superset.charts.dao import ChartDAO
 from superset.charts.schemas import ImportV1ChartSchema
 from superset.commands.importers.v1 import ImportModelsCommand
+from superset.connectors.sqla.models import SqlaTable
 from superset.databases.commands.importers.v1.utils import import_database
 from superset.databases.schemas import ImportV1DatabaseSchema
 from superset.datasets.commands.importers.v1.utils import import_dataset
@@ -69,7 +70,7 @@ def _import(
                 database_ids[str(database.uuid)] = database.id
 
         # import datasets with the correct parent ref
-        dataset_info: Dict[str, Dict[str, Any]] = {}
+        datasets: Dict[str, SqlaTable] = {}
         for file_name, config in configs.items():
             if (
                 file_name.startswith("datasets/")
@@ -77,18 +78,21 @@ def _import(
             ):
                 config["database_id"] = database_ids[config["database_uuid"]]
                 dataset = import_dataset(session, config, overwrite=False)
-                dataset_info[str(dataset.uuid)] = {
-                    "datasource_id": dataset.id,
-                    "datasource_type": "view" if dataset.is_sqllab_view else "table",
-                    "datasource_name": dataset.table_name,
-                }
+                datasets[str(dataset.uuid)] = dataset
 
         # import charts with the correct parent ref
         for file_name, config in configs.items():
-            if (
-                file_name.startswith("charts/")
-                and config["dataset_uuid"] in dataset_info
-            ):
+            if file_name.startswith("charts/") and config["dataset_uuid"] in datasets:
                 # update datasource id, type, and name
-                config.update(dataset_info[config["dataset_uuid"]])
+                dataset = datasets[config["dataset_uuid"]]
+                config.update(
+                    {
+                        "datasource_id": dataset.id,
+                        "datasource_type": "view"
+                        if dataset.is_sqllab_view
+                        else "table",
+                        "datasource_name": dataset.table_name,
+                    }
+                )
+                config["params"].update({"datasource": dataset.uid})
                 import_chart(session, config, overwrite=overwrite)
diff --git a/tests/charts/commands_tests.py b/tests/charts/commands_tests.py
index d1e862eabc07e..73c01ea3d49b6 100644
--- a/tests/charts/commands_tests.py
+++ b/tests/charts/commands_tests.py
@@ -140,10 +140,13 @@ def test_import_v1_chart(self):
         command = ImportChartsCommand(contents)
         command.run()
 
-        chart = db.session.query(Slice).filter_by(uuid=chart_config["uuid"]).one()
+        chart: Slice = db.session.query(Slice).filter_by(
+            uuid=chart_config["uuid"]
+        ).one()
+        dataset = chart.datasource
         assert json.loads(chart.params) == {
             "color_picker": {"a": 1, "b": 135, "g": 122, "r": 0},
-            "datasource": "12__table",
+            "datasource": dataset.uid,
             "js_columns": ["color"],
             "js_data_mutator": "data => data.map(d => ({\\n    ...d,\\n    color: colors.hexToRGB(d.extraProps.color)\\n}));",
             "js_onclick_href": "",