diff --git a/client/src/pages/admin/competitions/CompetitionManager.tsx b/client/src/pages/admin/competitions/CompetitionManager.tsx
index 7c2c969efba20debfc116818a6f04945cb6ecbfe..d0b252a3adfc88d1d4864c645be74cc27ae6709e 100644
--- a/client/src/pages/admin/competitions/CompetitionManager.tsx
+++ b/client/src/pages/admin/competitions/CompetitionManager.tsx
@@ -316,7 +316,7 @@ const CompetitionManager: React.FC = (props: any) => {
           <TableBody>
             {competitions &&
               competitions.map((row) => (
-                <TableRow key={row.name}>
+                <TableRow key={row.id}>
                   <TableCell scope="row">
                     <Button color="primary" component={Link} to={`/editor/competition-id=${row.id}`}>
                       {row.name}
diff --git a/client/src/pages/admin/regions/Regions.tsx b/client/src/pages/admin/regions/Regions.tsx
index 0458266fa7a9bb1fb26e2949e33c7cc2192f78fa..f9a92ff73046c4d73af84d2105e8eef88038eb04 100644
--- a/client/src/pages/admin/regions/Regions.tsx
+++ b/client/src/pages/admin/regions/Regions.tsx
@@ -81,7 +81,7 @@ const RegionManager: React.FC = (props: any) => {
           <TableBody>
             {cities &&
               cities.map((row) => (
-                <TableRow key={row.name}>
+                <TableRow key={row.id}>
                   <TableCell scope="row">{row.name}</TableCell>
                   <TableCell align="right">
                     <Button onClick={(event) => handleClick(event, row.id)} data-testid={row.name}>
diff --git a/client/src/pages/admin/users/UserManager.tsx b/client/src/pages/admin/users/UserManager.tsx
index 0b32e86893a979c3e37061102e49ab4fb5ed4e7f..a51a472dcac25bbb958a795db0db7e0c366589d8 100644
--- a/client/src/pages/admin/users/UserManager.tsx
+++ b/client/src/pages/admin/users/UserManager.tsx
@@ -152,7 +152,7 @@ const UserManager: React.FC = (props: any) => {
           <TableBody>
             {users &&
               users.map((row) => (
-                <TableRow key={row.email}>
+                <TableRow key={row.id}>
                   <TableCell scope="row">{row.email}</TableCell>
                   <TableCell scope="row">{row.name}</TableCell>
                   <TableCell>{cities.find((city) => city.id === row.city_id)?.name || ''}</TableCell>