diff --git a/src/org/kar/archidata/annotation/checker/CheckForeignKey.java b/src/org/kar/archidata/annotation/checker/CheckForeignKey.java
index cc393af..79cc9b8 100644
--- a/src/org/kar/archidata/annotation/checker/CheckForeignKey.java
+++ b/src/org/kar/archidata/annotation/checker/CheckForeignKey.java
@@ -9,7 +9,15 @@ import jakarta.validation.Constraint;
 import jakarta.validation.Payload;
 
 @Constraint(validatedBy = CheckForeignKeyValidator.class)
-@Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
+@Target({ ElementType.TYPE, //
+		ElementType.METHOD, //
+		ElementType.FIELD, //
+		ElementType.ANNOTATION_TYPE, //
+		ElementType.CONSTRUCTOR, //
+		ElementType.PARAMETER, //
+		ElementType.TYPE_USE, //
+})
+
 @Retention(RetentionPolicy.RUNTIME)
 public @interface CheckForeignKey {
 	Class<?> target();
diff --git a/src/org/kar/archidata/annotation/checker/CheckForeignKeyValidator.java b/src/org/kar/archidata/annotation/checker/CheckForeignKeyValidator.java
index 4ba36b2..de9146b 100644
--- a/src/org/kar/archidata/annotation/checker/CheckForeignKeyValidator.java
+++ b/src/org/kar/archidata/annotation/checker/CheckForeignKeyValidator.java
@@ -1,14 +1,15 @@
 package org.kar.archidata.annotation.checker;
 
-import java.util.Collection;
-
 import org.kar.archidata.dataAccess.DataAccess;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import jakarta.validation.ConstraintValidator;
 import jakarta.validation.ConstraintValidatorContext;
 
 public class CheckForeignKeyValidator implements ConstraintValidator<CheckForeignKey, Object> {
 	Class<?> target = null;
+	private final static Logger LOGGER = LoggerFactory.getLogger(CheckForeignKeyValidator.class);
 
 	@Override
 	public void initialize(final CheckForeignKey annotation) {
@@ -17,26 +18,18 @@ public class CheckForeignKeyValidator implements ConstraintValidator<CheckForeig
 
 	@Override
 	public boolean isValid(final Object value, final ConstraintValidatorContext context) {
-		if (value != null) {
+		if (value == null) {
 			return true;
 		}
-		if (value instanceof final Collection<?> tmpCollection) {
-			final Object[] elements = tmpCollection.toArray();
-			for (final Object element : elements) {
-				if (element == null) {
-					continue;
-				}
-				try {
-					final long count = DataAccess.count(this.target, element);
-					if (count != 1) {
-						return false;
-
-					}
-				} catch (final Exception e) {
-					// TODO ...
-					return false;
-				}
+		try {
+			final long count = DataAccess.count(this.target, value);
+			if (count != 1) {
+				return false;
 			}
+		} catch (final Exception e) {
+			LOGGER.error("Fail to access to the DB");
+			context.buildConstraintViolationWithTemplate("fail to access on the DB").addConstraintViolation();
+			return false;
 		}
 		return true;
 	}