diff --git a/config.html b/config.html
index 50f295b..6021580 100644
--- a/config.html
+++ b/config.html
@@ -46,6 +46,7 @@
 {{/form}}
 
 {{:admin_header title="Configuration" custom_css="./style.css" current="module_amortization"}}
+
 {{:include file="_nav.html" current="config"}}
 {{if $_GET.ok == 1}}
 	<p class="block confirm">Configuration enregistrée.</p>
@@ -154,13 +155,14 @@
 							}}
 						</td>
 						<td class="actions">
+						{{if ! $code|in:$config_defaut.prefixes}}
 							{{:button
 								label="Enlever"
-								title="Enlever une ligne"
 								shape="minus"
 								min="1"
 								name="remove_line"
 							}}
+						{{/if}}
 						</td>
 					</tr>
 				{{/foreach}}
@@ -187,6 +189,7 @@
 			</thead>
 			<tbody>
 
+				{{:assign unfinished_lines=$config_defaut.unfinished|map:implode:"-"|implode:","}}
 				{{#foreach from=$unfinished_accounts key=code item=elem}}
 					<tr>
 						<td>
@@ -200,13 +203,15 @@
 							}}
 						</td>
 						<td class="actions">
-							{{:button
-								label="Enlever"
-								title="Enlever une ligne"
-								shape="minus"
-								min="1"
-								name="remove_line"
-							}}
+							{{if $unfinished_lines|strpos:$code === false}}
+								{{:button
+									label="Enlever"
+									title="Enlever une ligne"
+									shape="minus"
+									min="1"
+									name="remove_line"
+									}}
+							{{/if}}
 						</td>
 					</tr>
 				{{/foreach}}
diff --git a/scripts.js b/scripts.js
index 0521809..3def0ba 100644
--- a/scripts.js
+++ b/scripts.js
@@ -145,19 +145,21 @@ function setSelectorYear(button_names, f_years_selector)
 
 // Associer au bouton « Enlever » de chaque ligne l'action de suppression de la ligne
 function initLine(row) {
-	var removeBtn = row.querySelector('button[name="remove_line"]');
-	removeBtn.onclick = () => {
-		let count = removeBtn.closest("table").querySelectorAll('tbody tr').length;
-		var min = removeBtn.getAttribute('min');
+	let removeBtn = row.querySelector('button[name="remove_line"]');
+	if (removeBtn != null) {
+		removeBtn.onclick = () => {
+			let count = removeBtn.closest("table").querySelectorAll('tbody tr').length;
+			var min = removeBtn.getAttribute('min');
 
-		if (count <= min) {
-			alert("Il n'est pas possible d'avoir moins de " + min + " ligne(s).");
-			return false;
-		}
+			if (count <= min) {
+				alert("Il n'est pas possible d'avoir moins de " + min + " ligne(s).");
+				return false;
+			}
 
-		row.parentNode.removeChild(row);
-		return true;
-	};
+			row.parentNode.removeChild(row);
+			return true;
+		};
+	}
 }
 
 // Associer au bouton « Ajouter » de chaque table l'action d'ajouter une ligne
@@ -185,6 +187,28 @@ function addLine(button, codes) {
 		let lib = newNode.querySelector('.input-list span.label');
 		lib.innerText = '';
 
+		// si besoin, ajouter le bouton de suppression
+		let action_cell = newNode.querySelector('td.actions');
+		let removeBtn = newNode.querySelector('button[name="remove_line"]');
+		if (removeBtn == null) {
+			const attributs = {
+				"title" : "Enlever une ligne",
+				"min": "1",
+				"name": "remove_line",
+				"data-icon": "➖",
+				"type": "button",
+				"class": "icn-btn",
+				"value": "1",
+				"aria-label": "Enlever une ligne"
+			};
+			let new_button = document.createElement("button");
+			new_button.appendChild(document.createTextNode("Enlever"));
+			for (let attr in attributs) {
+				new_button.setAttribute(attr, attributs[attr]);
+			}
+			action_cell.appendChild(new_button);
+		}
+
 		// ajouter la nouvelle ligne
 		line.parentNode.appendChild(newNode);
 		initLine(newNode);