diff --git a/models/forgefed/activity.go b/models/forgefed/activity.go
index 491a938bd5..6e315fe591 100644
--- a/models/forgefed/activity.go
+++ b/models/forgefed/activity.go
@@ -4,6 +4,8 @@
 package forgefed
 
 import (
+	"time"
+
 	"code.gitea.io/gitea/modules/validation"
 	ap "github.com/go-ap/activitypub"
 )
@@ -15,22 +17,26 @@ type ForgeLike struct {
 	ap.Activity
 }
 
-func (s ForgeLike) MarshalJSON() ([]byte, error) {
-	return s.Activity.MarshalJSON()
+func (like ForgeLike) MarshalJSON() ([]byte, error) {
+	return like.Activity.MarshalJSON()
 }
 
-func (s *ForgeLike) UnmarshalJSON(data []byte) error {
-	return s.Activity.UnmarshalJSON(data)
+func (like *ForgeLike) UnmarshalJSON(data []byte) error {
+	return like.Activity.UnmarshalJSON(data)
 }
 
-func (s ForgeLike) Validate() []string {
+func (like ForgeLike) IsNewer(compareTo time.Time) bool {
+	return like.StartTime.After(compareTo)
+}
+
+func (like ForgeLike) Validate() []string {
 	var result []string
-	result = append(result, validation.ValidateNotEmpty(string(s.Type), "type")...)
-	result = append(result, validation.ValidateOneOf(string(s.Type), []any{"Like"})...)
-	result = append(result, validation.ValidateNotEmpty(s.Actor.GetID().String(), "actor")...)
-	result = append(result, validation.ValidateNotEmpty(s.Object.GetID().String(), "object")...)
-	result = append(result, validation.ValidateNotEmpty(s.StartTime.String(), "startTime")...)
-	if s.StartTime.IsZero() {
+	result = append(result, validation.ValidateNotEmpty(string(like.Type), "type")...)
+	result = append(result, validation.ValidateOneOf(string(like.Type), []any{"Like"})...)
+	result = append(result, validation.ValidateNotEmpty(like.Actor.GetID().String(), "actor")...)
+	result = append(result, validation.ValidateNotEmpty(like.Object.GetID().String(), "object")...)
+	result = append(result, validation.ValidateNotEmpty(like.StartTime.String(), "startTime")...)
+	if like.StartTime.IsZero() {
 		result = append(result, "StartTime was invalid.")
 	}
 
diff --git a/models/forgefed/federationinfo.go b/models/forgefed/federationinfo.go
index 417feb1e19..a24898495c 100644
--- a/models/forgefed/federationinfo.go
+++ b/models/forgefed/federationinfo.go
@@ -4,6 +4,8 @@
 package forgefed
 
 import (
+	"time"
+
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/validation"
 )
@@ -14,7 +16,7 @@ type FederationInfo struct {
 	ID             int64              `xorm:"pk autoincr"`
 	HostFqdn       string             `xorm:"host_fqdn UNIQUE INDEX VARCHAR(255) NOT NULL"`
 	NodeInfo       NodeInfo           `xorm:"extends NOT NULL"`
-	LatestActivity timeutil.TimeStamp `xorm:"NOT NULL"`
+	LatestActivity time.Time          `xorm:"NOT NULL"`
 	Create         timeutil.TimeStamp `xorm:"created"`
 	Updated        timeutil.TimeStamp `xorm:"updated"`
 }
diff --git a/models/forgefed/federationinfo_repository.go b/models/forgefed/federationinfo_repository.go
index ab13810072..50796a8d50 100644
--- a/models/forgefed/federationinfo_repository.go
+++ b/models/forgefed/federationinfo_repository.go
@@ -50,3 +50,11 @@ func CreateFederationInfo(ctx context.Context, info FederationInfo) error {
 	_, err := db.GetEngine(ctx).Insert(info)
 	return err
 }
+
+func UpdateFederationInfo(ctx context.Context, info FederationInfo) error {
+	if res, err := validation.IsValid(info); !res {
+		return fmt.Errorf("FederationInfo is not valid: %v", err)
+	}
+	_, err := db.GetEngine(ctx).ID(info.ID).Update(info)
+	return err
+}
diff --git a/models/forgefed/federationinfo_test.go b/models/forgefed/federationinfo_test.go
index d40d42dc02..4028c27b8a 100644
--- a/models/forgefed/federationinfo_test.go
+++ b/models/forgefed/federationinfo_test.go
@@ -5,8 +5,8 @@ package forgefed
 
 import (
 	"testing"
+	"time"
 
-	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/validation"
 )
 
@@ -16,7 +16,7 @@ func Test_FederationInfoValidation(t *testing.T) {
 		NodeInfo: NodeInfo{
 			Source: "forgejo",
 		},
-		LatestActivity: timeutil.TimeStampNow(),
+		LatestActivity: time.Now(),
 	}
 	if res, err := validation.IsValid(sut); !res {
 		t.Errorf("sut should be valid but was %q", err)
@@ -25,7 +25,7 @@ func Test_FederationInfoValidation(t *testing.T) {
 	sut = FederationInfo{
 		HostFqdn:       "host.do.main",
 		NodeInfo:       NodeInfo{},
-		LatestActivity: timeutil.TimeStampNow(),
+		LatestActivity: time.Now(),
 	}
 	if res, _ := validation.IsValid(sut); res {
 		t.Errorf("sut should be invalid")
diff --git a/routers/api/v1/activitypub/repository.go b/routers/api/v1/activitypub/repository.go
index f6dd539521..d5674ebb9a 100644
--- a/routers/api/v1/activitypub/repository.go
+++ b/routers/api/v1/activitypub/repository.go
@@ -51,7 +51,7 @@ func Repository(ctx *context.APIContext) {
 	repo.Name = ap.NaturalLanguageValuesNew()
 	err := repo.Name.Set("en", ap.Content(ctx.Repo.Repository.Name))
 	if err != nil {
-		ctx.ServerError("Set Name", err)
+		ctx.Error(http.StatusInternalServerError, "Set Name", err)
 		return
 	}
 
@@ -86,7 +86,7 @@ func RepositoryInbox(ctx *context.APIContext) {
 
 	activity := web.GetForm(ctx).(*forgefed.ForgeLike)
 	if res, err := validation.IsValid(activity); !res {
-		ctx.ServerError("Validate activity", err)
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate activity", err)
 		return
 	}
 	log.Info("RepositoryInbox: activity validated:%v", activity)
@@ -96,33 +96,39 @@ func RepositoryInbox(ctx *context.APIContext) {
 	rawActorID, err := forgefed.NewActorID(actorUri)
 	federationInfo, err := forgefed.FindFederationInfoByHostFqdn(ctx, rawActorID.Host)
 	if err != nil {
-		ctx.ServerError("Error while loading FederationInfo: %v", err)
+		ctx.Error(http.StatusInternalServerError,
+			"RepositoryInbox: Error while loading FederationInfo", err)
 		return
 	}
 	if federationInfo == nil {
 		result, err := createFederationInfo(ctx, rawActorID)
 		if err != nil {
-			ctx.ServerError("Validate actorId", err)
+			ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate actorId", err)
 			return
 		}
 		federationInfo = &result
 		log.Info("RepositoryInbox: federationInfo validated: %v", federationInfo)
 	}
+	if !activity.IsNewer(federationInfo.LatestActivity) {
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate Activity",
+			fmt.Errorf("Activity already processed"))
+		return
+	}
 
 	actorID, err := forgefed.NewPersonID(actorUri, string(federationInfo.NodeInfo.Source))
 	if err != nil {
-		ctx.ServerError("Validate actorId", err)
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate actorId", err)
 		return
 	}
 	log.Info("RepositoryInbox: actorId validated: %v", actorID)
 	// parse objectID (repository)
 	objectID, err := forgefed.NewRepositoryID(activity.Object.GetID().String(), string(forgefed.ForgejoSourceType))
 	if err != nil {
-		ctx.ServerError("Validate objectId", err)
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate objectId", err)
 		return
 	}
 	if objectID.ID != fmt.Sprint(repository.ID) {
-		ctx.ServerError("Validate objectId", err)
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Validate objectId", err)
 		return
 	}
 	log.Info("RepositoryInbox: objectId validated: %v", objectID)
@@ -133,7 +139,7 @@ func RepositoryInbox(ctx *context.APIContext) {
 	// Check if user already exists
 	users, err := SearchUsersByLoginName(actorAsLoginID)
 	if err != nil {
-		ctx.ServerError("Searching for user failed", err)
+		ctx.Error(http.StatusInternalServerError, "RepositoryInbox: Searching for user failed", err)
 		return
 	}
 	log.Info("RepositoryInbox: local found users: %v", len(users))
@@ -143,7 +149,8 @@ func RepositoryInbox(ctx *context.APIContext) {
 		{
 			user, err = createUserFromAP(ctx, actorID)
 			if err != nil {
-				ctx.ServerError("Creating user failed", err)
+				ctx.Error(http.StatusInternalServerError,
+					"RepositoryInbox: Creating federated user failed", err)
 				return
 			}
 			log.Info("RepositoryInbox: created user from ap: %v", user)
@@ -155,8 +162,8 @@ func RepositoryInbox(ctx *context.APIContext) {
 		}
 	default:
 		{
-			ctx.Error(http.StatusInternalServerError, "StarRepo",
-				fmt.Errorf("found more than one matches for federated users"))
+			ctx.Error(http.StatusInternalServerError, "RepositoryInbox",
+				fmt.Errorf(" more than one matches for federated users"))
 			return
 		}
 	}
@@ -166,10 +173,16 @@ func RepositoryInbox(ctx *context.APIContext) {
 	if !alreadyStared {
 		err = repo_model.StarRepo(ctx, user.ID, repository.ID, true)
 		if err != nil {
-			ctx.Error(http.StatusInternalServerError, "StarRepo", err)
+			ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: Star operation", err)
 			return
 		}
 	}
+	federationInfo.LatestActivity = activity.StartTime
+	err = forgefed.UpdateFederationInfo(ctx, *federationInfo)
+	if err != nil {
+		ctx.Error(http.StatusNotAcceptable, "RepositoryInbox: error updateing federateionInfo", err)
+		return
+	}
 
 	ctx.Status(http.StatusNoContent)
 }