diff --git a/README.md b/README.md
index 8c32d5df2d..4b5dd1ac21 100644
--- a/README.md
+++ b/README.md
@@ -244,3 +244,14 @@ If you want changes to be made locally instead of generating pull requests in pr
 
 - First, [contribuer/public/admin/config.yml#L19](https://github.com/betagouv/aides-jeunes/blob/main/contribuer/public/admin/config.yml#L19) ([`local_backend: true`](https://decapcms.org/docs/working-with-a-local-git-repository)) must be uncommented;
 - `npx netlify-cms-proxy-server` should be ran from `.` and
+
+## Check Link Validity
+
+Some parameters can be use to debug the command
+
+- `--dry-run` : this command is useful to not send update/new row to Grist
+- `--no-priority` : without getting priority from analytic data
+- `--only [slug benefit]` : work on specific benefit
+
+Here is an example of how using this parameters
+`npm run tools:check-links-validity -- --dry-run`
diff --git a/lib/benefits/link-validity.ts b/lib/benefits/link-validity.ts
index 934d14542b..9780b10590 100644
--- a/lib/benefits/link-validity.ts
+++ b/lib/benefits/link-validity.ts
@@ -91,9 +91,39 @@ export function determineOperationsOnBenefitLinkError(
     : processCron
   const operations: GristOperation[] = []
   const benefitId = benefitLinksCheckResult.id
+  const existingWarningsLink = existingWarnings?.[benefitId]
+
   benefitLinksCheckResult.links.forEach((link) => {
-    const existingWarning = existingWarnings?.[benefitId]?.[link.type]
+    const existingWarning = existingWarningsLink?.[link.type]
     processor(benefitLinksCheckResult, link, existingWarning, operations)
+    if (
+      (!existingWarning && existingWarningsLink) ||
+      (existingWarning && Object.entries(existingWarningsLink).length > 1)
+    ) {
+      // cas ou le lien a été supprimé ainsi que sa propriété
+      for (const type in existingWarningsLink) {
+        if (
+          !benefitLinksCheckResult.links.some(
+            (linkObject) =>
+              linkObject.link === existingWarningsLink[type]?.fields?.Lien &&
+              benefitLinksCheckResult.links.length > 0
+          ) || //Si le lien analysé n'est pas présent dans la liste des liens d'erreurs et qu'il y a au moins un lien
+          (!existingWarning &&
+            benefitLinksCheckResult.links.some(
+              (linkObject) =>
+                linkObject.link === existingWarningsLink[type]?.fields?.Lien &&
+                linkObject.ok
+            ))
+        ) {
+          processor(
+            benefitLinksCheckResult,
+            link,
+            existingWarningsLink[type],
+            operations
+          )
+        }
+      }
+    }
   })
 
   return operations
@@ -111,11 +141,11 @@ export function determineExistingWarningsFixByPrivateBenefits(
     )
     if (privateBenefit?.length) {
       for (const type in existingWarnings[warningBenefitId]) {
-        const fixPullRequestUrl =
+        const PR =
           pullRequestURL &&
           existingWarnings[warningBenefitId][type].fields.PR !== pullRequestURL
-            ? pullRequestURL
-            : existingWarnings[warningBenefitId][type].fields.PR
+            ? { pullRequestURL }
+            : {}
         benefitOperationsList.push([
           {
             type: "update",
@@ -123,7 +153,7 @@ export function determineExistingWarningsFixByPrivateBenefits(
               id: existingWarnings[warningBenefitId][type].id,
               fields: {
                 Corrige: true,
-                PR: fixPullRequestUrl,
+                ...PR,
               },
             },
           },
diff --git a/lib/types/link-validity.d.ts b/lib/types/link-validity.d.ts
index 67962b3a82..4f813a1704 100644
--- a/lib/types/link-validity.d.ts
+++ b/lib/types/link-validity.d.ts
@@ -19,7 +19,7 @@ interface GristFields {
   Dans_une_PR: boolean
   Corrige: boolean
   Date_PR: number
-  Date_correction: number
+  Date_correction: Date
   PR: string
   Date_erreur_de_detection: string
   Aide: string
diff --git a/tools/check-links-validity.ts b/tools/check-links-validity.ts
index 824d20dd08..009282704f 100755
--- a/tools/check-links-validity.ts
+++ b/tools/check-links-validity.ts
@@ -47,6 +47,13 @@ async function getHTTPStatus(link) {
       headers: {
         "User-Agent":
           "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0",
+        Referer: "https://mes-aides.1jeune1solution.beta.gouv.fr/",
+        TE: "trailers",
+        "Upgrade-Insecure-Requests": 1,
+        "Sec-Fetch-Mode": "navigate",
+        "Sec-GPC": "1",
+        "Sec-Fetch-User": "?1",
+        "Sec-Fetch-Dest": "document",
       },
       httpsAgent,
     })
@@ -266,7 +273,6 @@ async function main() {
       `Ajout: ${recordsByOperationTypes.add.length}`,
       `Mise à jour: ${recordsByOperationTypes.update.length}`,
     ].join("\n")
-
     Mattermost.post(text, process.env.MATTERMOST_ALERTING_URL)
   }
 }