diff --git a/controllers/sections.go b/controllers/sections.go
index 50362b6..2c857c6 100644
--- a/controllers/sections.go
+++ b/controllers/sections.go
@@ -69,6 +69,11 @@ func SectionAdd(c *fiber.Ctx) error {
 		return err
 	}
 
+	var sections []models.Section
+	db.Order("name collate nocase asc").Find(
+		&sections, "id <> ? AND parent_section_id = 0", section.ID,
+	)
+
 	if c.Method() == "POST" {
 		name := c.FormValue("name")
 		shortName := c.FormValue("short_name")
@@ -84,13 +89,32 @@ func SectionAdd(c *fiber.Ctx) error {
 			errors = append(errors, "Le nom technique doit contentir entre 1 et 100 caractères")
 		}
 
+		var checkName []models.Section
+		db.Find(&checkName, "name = ?", name)
+
+		if len(checkName) > 0 {
+			errors = append(errors, "Le nom doit être unique")
+		}
+
+		var checkShortName []models.Section
+		db.Find(&checkShortName, "short_name = ?", shortName)
+
+		if len(checkShortName) > 0 {
+			errors = append(errors, "Le nom technique doit être unique")
+		}
+
 		section.Name = name
 		section.ShortName = shortName
 
 		section.ParentSectionID = 0
 		parentSectionID, err := strconv.ParseUint(parentSection, 10, 0)
 		if err == nil {
-			section.ParentSectionID = uint(parentSectionID)
+			for _, parentSection := range sections {
+				if parentSection.ID == uint(parentSectionID) {
+					section.ParentSectionID = uint(parentSectionID)
+					break
+				}
+			}
 		}
 
 		section.ContainsMembers = false
@@ -116,9 +140,6 @@ func SectionAdd(c *fiber.Ctx) error {
 		}
 	}
 
-	var sections []models.Section
-	db.Order("name collate nocase asc").Find(&sections)
-
 	return c.Render("section_form", fiber.Map{
 		"PageTitle": "Ajouter une section",
 		"Section":   section,
@@ -146,11 +167,20 @@ func SectionEdit(c *fiber.Ctx) error {
 		return result.Error
 	}
 
+	var childSections []models.Section
+	db.Find(&childSections, "parent_section_id = ?", section.ID)
+	isParent := (len(childSections) > 0)
+
 	title := fmt.Sprintf(
 		"%s | Modifier section",
 		section.Name,
 	)
 
+	var sections []models.Section
+	db.Order("name collate nocase asc").Find(
+		&sections, "id <> ? AND parent_section_id = 0", section.ID,
+	)
+
 	var errors []string
 	if c.Method() == "POST" {
 		name := c.FormValue("name")
@@ -173,7 +203,12 @@ func SectionEdit(c *fiber.Ctx) error {
 		section.ParentSectionID = 0
 		parentSectionID, err := strconv.ParseUint(parentSection, 10, 0)
 		if err == nil {
-			section.ParentSectionID = uint(parentSectionID)
+			for _, parentSection := range sections {
+				if parentSection.ID == uint(parentSectionID) {
+					section.ParentSectionID = uint(parentSectionID)
+					break
+				}
+			}
 		}
 
 		section.ContainsMembers = false
@@ -199,13 +234,11 @@ func SectionEdit(c *fiber.Ctx) error {
 		}
 	}
 
-	var sections []models.Section
-	db.Order("name collate nocase asc").Find(&sections, "id <> ?", section.ID)
-
 	return c.Render("section_form", fiber.Map{
 		"PageTitle": title,
 		"Section":   section,
 		"Sections":  sections,
+		"IsParent":  isParent,
 		"Errors":    errors,
 	})
 }
diff --git a/views/section_form.html b/views/section_form.html
index e493e5b..7c1bbe3 100644
--- a/views/section_form.html
+++ b/views/section_form.html
@@ -68,16 +68,19 @@
 				id="parent_section"
 				class="form-control"
 				name="parent_section"
+				{% if IsParent %}disabled{% endif %}
 			>
 				<option value="0">--- Pas de section parente ---</option>
-				{% for ParentSection in Sections %}
-				<option
-					value="{{ ParentSection.ID }}"
-					{% if Section.ParentSectionID == ParentSection.ID %}selected{% endif %}
-				>
-					{{ ParentSection.Name }}
-				</option>
-				{% endfor %}
+					{% if !IsParent %}
+						{% for ParentSection in Sections %}
+						<option
+							value="{{ ParentSection.ID }}"
+							{% if Section.ParentSectionID == ParentSection.ID %}selected{% endif %}
+						>
+							{{ ParentSection.Name }}
+						</option>
+						{% endfor %}
+					{% endif %}
 			</select>
 		</div>