diff --git a/htdocs/core/lib/admin.lib.php b/htdocs/core/lib/admin.lib.php
index 560f7c55720..fdc61e4ecbb 100644
--- a/htdocs/core/lib/admin.lib.php
+++ b/htdocs/core/lib/admin.lib.php
@@ -1341,6 +1341,8 @@ function unActivateModule($value, $requiredby = 1, $options = '')
 {
 	global $db;
 
+	dol_syslog("unActivateModule value=".$value, LOG_INFO);
+
 	// Check parameters
 	if (empty($value)) {
 		return 'ErrorBadParameter';
@@ -1368,6 +1370,7 @@ function unActivateModule($value, $requiredby = 1, $options = '')
 		$objMod = new $modName($db);
 		'@phan-var-force DolibarrModules $objMod';
 		/** @var DolibarrModules $objMod */
+
 		$result = $objMod->remove($options);
 		if ($result <= 0) {
 			$ret = $objMod->error;
diff --git a/htdocs/core/modules/modBlockedLog.class.php b/htdocs/core/modules/modBlockedLog.class.php
index 1486a70039d..beed7c8abbd 100644
--- a/htdocs/core/modules/modBlockedLog.class.php
+++ b/htdocs/core/modules/modBlockedLog.class.php
@@ -253,7 +253,7 @@ class modBlockedLog extends DolibarrModules
 	 * The remove function removes tabs, constants, boxes, permissions and menus from Dolibarr database.
 	 * Data directories are not deleted
 	 *
-	 * @param      string	$options    Options when enabling module ('', 'noboxes')
+	 * @param      string	$options    Options when enabling module ('', 'noboxes', 'forcedisable')
 	 * @return     int             		1 if OK, 0 if KO
 	 */
 	public function remove($options = '')
@@ -265,6 +265,8 @@ class modBlockedLog extends DolibarrModules
 		// If already used, we add an entry to show we enable module
 		require_once DOL_DOCUMENT_ROOT.'/blockedlog/class/blockedlog.class.php';
 
+		dol_syslog("modBlockedLog::remove option=".$options, LOG_DEBUG);
+
 		$object = new stdClass();
 		$object->id = 1;
 		$object->element = 'module';
@@ -283,7 +285,7 @@ class modBlockedLog extends DolibarrModules
 
 		if ($b->alreadyUsed(1)) {
 			// Unalterable log was already used.
-			if (!$b->canBeDisabled()) {
+			if ($options != 'forcedisable' && !$b->canBeDisabled()) {
 				// Case we refuse to disable it
 				global $langs;
 				$this->error = $langs->trans('DisablingBlockedLogIsNotallowedOnceUsedExceptOnFullreset', $langs->transnoentitiesnoconv('BlockedLog'));
diff --git a/test/phpunit/NumberingModulesTest.php b/test/phpunit/NumberingModulesTest.php
index e1eab123df4..a4d62bfa916 100644
--- a/test/phpunit/NumberingModulesTest.php
+++ b/test/phpunit/NumberingModulesTest.php
@@ -91,19 +91,23 @@ class NumberingModulesTest extends CommonClassTest
 		print __METHOD__." result3=".$result."\n";
 		$this->assertEquals(1, $result3, 'Test that the validation of an invoice with the forced ref '.$newref.' is ok: '.$localobject->error);	// counter must start to 1
 
-		// Force enable of BlockedLog (not possible from application, but required to allow the test with sample data))
-		activateModule('modBlockedLog', 1, 1);
+		if (constant("CERTIF_LNE")) {
+			// If we are a not qualified certified version, we can add this use case test.
 
-		$result = $localobject->is_erasable();
-		print __METHOD__." is_erasable=".$result."\n";
-		$this->assertEquals(-7, $result, 'Test for is_erasable, 1st invoice without other invoice');			    // Can be deleted
+			// Force enable of BlockedLog (required to allow this use case)
+			activateModule('modBlockedLog', 1, 1);
+
+			$result = $localobject->is_erasable();
+			print __METHOD__." is_erasable=".$result."\n";
+			$this->assertEquals(-7, $result, 'Test for is_erasable, once module blockedlog is on, 1st invoice without other invoice');			    // Can be deleted
+		}
 
 		// Disable module BlockedLog (not possible from application, but required to allow the test with sample data))
-		unActivateModule('modBlockedLog');
+		unActivateModule('modBlockedLog', 1, 'forcedisable');
 
 		$result = $localobject->is_erasable();
 		print __METHOD__." is_erasable=".$result."\n";
-		$this->assertGreaterThanOrEqual(1, $result, 'Test for is_erasable, 1st invoice without other invoice');	    // Can be deleted
+		$this->assertGreaterThanOrEqual(1, $result, 'Test for is_erasable, once module blockedlog is off, 1st invoice without other invoice');	    // Can be deleted
 
 		// We emulate print on invoice 3 times
 		$localobject->pos_print_counter = 3;