diff --git a/Control/public/pages/Environment/components/controlEnvironmentPanel.js b/Control/public/pages/Environment/components/controlEnvironmentPanel.js
index d1b6c37c4..5eb767c1e 100644
--- a/Control/public/pages/Environment/components/controlEnvironmentPanel.js
+++ b/Control/public/pages/Environment/components/controlEnvironmentPanel.js
@@ -28,7 +28,8 @@ import {environmentReadinessStatus} from '../../../common/environment/environmen
  * @returns {vnode} - panel with actions allowed for the user to apply on the environment
  */
 export const controlEnvironmentPanel = (environmentModel, item, isAllowedToControl = false) => {
-  const {currentTransition} = item;
+  const { state, currentTransition } = item;
+  const { userVars: {run_start_time_ms} } = item;
   const {model} = environmentModel;
   const {statusMessage} = environmentReadinessStatus(item, model);
   return h('.flex-column.justify-center', {
@@ -48,10 +49,12 @@ export const controlEnvironmentPanel = (environmentModel, item, isAllowedToContr
     ]),
     isAllowedToControl && h('.flex-row.flex-end.g2.items-center', [
       statusMessage && h('.danger.flex-end.flex-row.flex-center', statusMessage),
-      controlButton(
-        '.btn-success.w-25', environmentModel, item, 'START', 'START_ACTIVITY', 'CONFIGURED',
-        Boolean(currentTransition)
-      ),
+      run_start_time_ms &&  state !== 'RUNNING' && !currentTransition ?
+        h('span.warning.text-right#start_action_warning', 'Environment was in RUNNING state once already')
+        : controlButton(
+          '.btn-success.w-25', environmentModel, item, 'START', 'START_ACTIVITY', 'CONFIGURED',
+          Boolean(currentTransition)
+        ),
       controlButton(
         '.btn-primary', environmentModel, item, 'CONFIGURE', 'CONFIGURE', '', Boolean(currentTransition)
       ), // button will not be displayed in any state due to OCTRL-628
diff --git a/Control/test/config/core-grpc.js b/Control/test/config/core-grpc.js
index bf289eaa0..bde581b2a 100644
--- a/Control/test/config/core-grpc.js
+++ b/Control/test/config/core-grpc.js
@@ -58,6 +58,7 @@ const coreGRPCServer = (config) => {
           break;
         case 2: // STOP
           envTest.environment.state = 'CONFIGURED';
+          envTest.environment.userVars.run_start_time_ms = '1648121309974';
           break;
         case 3: // CONFIGURE
           envTest.environment.state = 'CONFIGURED';
diff --git a/Control/test/public/page-environment-mocha.js b/Control/test/public/page-environment-mocha.js
index 770408c41..d9c5eea6a 100644
--- a/Control/test/public/page-environment-mocha.js
+++ b/Control/test/public/page-environment-mocha.js
@@ -159,19 +159,25 @@ describe('`pageEnvironment` test-suite', async () => {
       await waitForTimeout(1000);
       const configuredState = await page.evaluate(() => window.model.environment.item.payload.state);
       assert.strictEqual(configuredState, 'CONFIGURED');
-      // click RESET
+    });
+
+    it('should display warning label for START button in state CONFIGURED', async () => {
+      await page.waitForSelector('#start_action_warning', { timeout: 5000 });
+      const startButtonWarning = await page.evaluate(() => document.querySelector('#start_action_warning').innerText);
+      assert.strictEqual(startButtonWarning, 'Environment was in RUNNING state once already');
+    });
+
+    it('should click RESET button to move states (CONFIGURED -> DEPLOYED)', async () => {
       await page.evaluate(() => document.querySelector('#buttonToRESET').click());
       await waitForTimeout(1000);
       const standbyState = await page.evaluate(() => window.model.environment.item.payload.state);
       assert.strictEqual(standbyState, 'DEPLOYED');
     });
 
-    it('should have one button hidden for START in state DEPLOYED', async () => {
-      await page.waitForSelector('#buttonToSTART', {timeout: 5000});
-      const startButtonTitle = await page.evaluate(() => document.querySelector('#buttonToSTART').title);
-      const startButtonStyle = await page.evaluate(() => document.querySelector('#buttonToSTART').style);
-      assert.strictEqual(startButtonTitle, `'START' cannot be used in state 'DEPLOYED'`);
-      assert.deepStrictEqual(startButtonStyle, {0: 'display'});
+    it('should display warning label for START button in state DEPLOYED', async () => {
+      await page.waitForSelector('#start_action_warning', { timeout: 5000 });
+      const startButtonWarning = await page.evaluate(() => document.querySelector('#start_action_warning').innerText);
+      assert.strictEqual(startButtonWarning, 'Environment was in RUNNING state once already');
     });
 
     it('should have one button hidden for STOP in state DEPLOYED', async () => {