diff --git a/backend/internal/http/handler/admin_read.go b/backend/internal/http/handler/admin_read.go
index fbe3bb6..830ef81 100644
--- a/backend/internal/http/handler/admin_read.go
+++ b/backend/internal/http/handler/admin_read.go
@@ -108,7 +108,10 @@ func (h *AdminReadHandler) Logs(c *gin.Context) {
 			userName = item.UserID
 		}
 		var accountName any
-		if item.AccountID != "" {
+		if item.AccountEmail != "" {
+			// Email stamped on the row itself survives account deletion/re-import.
+			accountName = item.AccountEmail
+		} else if item.AccountID != "" {
 			if label, ok := accountByID[item.AccountID]; ok {
 				accountName = label
 			} else {
diff --git a/backend/internal/http/handler/user_generation.go b/backend/internal/http/handler/user_generation.go
index 4d4c70e..e65713e 100644
--- a/backend/internal/http/handler/user_generation.go
+++ b/backend/internal/http/handler/user_generation.go
@@ -284,7 +284,10 @@ func (h *UserGenerationHandler) Logs(c *gin.Context) {
 		// which upstream account (email) fulfilled their generation.
 		var accountName, accountID any
 		if userID == "" {
-			if item.AccountID != "" {
+			if item.AccountEmail != "" {
+				// Email stamped on the row itself survives account deletion/re-import.
+				accountName = item.AccountEmail
+			} else if item.AccountID != "" {
 				if label, ok := accountByID[item.AccountID]; ok {
 					accountName = label
 				} else {
diff --git a/backend/internal/model/models.go b/backend/internal/model/models.go
index 6f370d6..1acbccf 100644
--- a/backend/internal/model/models.go
+++ b/backend/internal/model/models.go
@@ -48,12 +48,12 @@ type BannedWord struct {
 // BannedWordHit records one blocked request: which word matched, who sent it,
 // and when. Feeds the admin 违禁词触发列表.
 type BannedWordHit struct {
-	ID        string `gorm:"primaryKey;size:32"`
-	WordID    string `gorm:"size:32;index"`
-	Word      string `gorm:"size:255;index;not null"`
-	UserID    string `gorm:"size:32;index"`
-	UserName  string `gorm:"size:255"` // snapshot of name/email at hit time
-	Prompt    string `gorm:"type:text"`
+	ID        string    `gorm:"primaryKey;size:32"`
+	WordID    string    `gorm:"size:32;index"`
+	Word      string    `gorm:"size:255;index;not null"`
+	UserID    string    `gorm:"size:32;index"`
+	UserName  string    `gorm:"size:255"` // snapshot of name/email at hit time
+	Prompt    string    `gorm:"type:text"`
 	CreatedAt time.Time `gorm:"index"`
 }
 
@@ -99,9 +99,13 @@ type EventLog struct {
 	// stamped when the upstream call begins. Drives the accounts view's live
 	// in-flight count (pending events per account) and lets an abandoned-event
 	// purge attribute the failure back to the account it was using.
-	AccountID string  `gorm:"size:64;index"`
-	UserID    string  `gorm:"size:32;index"`
-	Cost      float64 `gorm:"not null;default:0"`
+	AccountID string `gorm:"size:64;index"`
+	// AccountEmail denormalizes the account's email at stamp time, so log rows
+	// keep showing which mailbox fulfilled the generation even after the account
+	// is deleted or re-imported under a different ID.
+	AccountEmail string  `gorm:"size:255"`
+	UserID       string  `gorm:"size:32;index"`
+	Cost         float64 `gorm:"not null;default:0"`
 	// Refunded marks that this event's up-front charge has already been credited
 	// back, so the normal failure path and the abandoned-purge sweep can never
 	// double-refund the same generation.
diff --git a/backend/internal/repo/event_repo.go b/backend/internal/repo/event_repo.go
index 6890ba4..64b1432 100644
--- a/backend/internal/repo/event_repo.go
+++ b/backend/internal/repo/event_repo.go
@@ -600,11 +600,11 @@ func (r *EventRepository) MarkRefunded(ctx context.Context, eventID string) (boo
 // SetAccount stamps which provider account is fulfilling an in-flight event.
 // Called when generation commits to a token, so the accounts view can count
 // pending events per account and an abandoned-event purge can attribute back.
-func (r *EventRepository) SetAccount(ctx context.Context, eventID, accountID string) error {
+func (r *EventRepository) SetAccount(ctx context.Context, eventID, accountID, accountEmail string) error {
 	return r.db.WithContext(ctx).
 		Model(&model.EventLog{}).
 		Where("id = ?", eventID).
-		Update("account_id", accountID).Error
+		Updates(map[string]any{"account_id": accountID, "account_email": accountEmail}).Error
 }
 
 // InFlightByAccount counts pending (in-flight) events grouped by account_id, for
diff --git a/backend/internal/service/v1.go b/backend/internal/service/v1.go
index db4ef4b..3b24645 100644
--- a/backend/internal/service/v1.go
+++ b/backend/internal/service/v1.go
@@ -1457,7 +1457,7 @@ func (s *V1Service) tryAccount(ctx context.Context, eventID, pool string, token
 	refreshOnAuth func(tokenID string) (model.TokenAccount, bool),
 	tempFailover bool,
 ) ([]byte, error, bool, bool) {
-	_ = s.events.SetAccount(ctx, eventID, token.ID)
+	_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 	_ = s.tokens.TouchLastUsed(ctx, token.ID)
 	authRefreshed := false
 	tempAttempts := 0
@@ -1711,7 +1711,7 @@ func (s *V1Service) generateRunwayVideo(ctx context.Context, eventID string, mod
 		var data []byte
 		done, failover := func() (bool, bool) {
 			defer s.acctRelease(ctx, token.ID, eventID)
-			_ = s.events.SetAccount(ctx, eventID, token.ID)
+			_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 			_ = s.tokens.TouchLastUsed(ctx, token.ID)
 			teamID := ""
 			if token.Meta != nil {
@@ -1851,7 +1851,7 @@ func (s *V1Service) generateCustomImage(ctx context.Context, eventID string, mod
 		var data []byte
 		done, failover := func() (bool, bool) {
 			defer s.acctRelease(ctx, token.ID, eventID)
-			_ = s.events.SetAccount(ctx, eventID, token.ID)
+			_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 			_ = s.tokens.TouchLastUsed(ctx, token.ID)
 			baseURL := stringValue(token.Meta["base_url"])
 			d, genErr := s.custom.GenerateImage(ctx, baseURL, token.Value, modelItem.ID, in.Prompt, size, quality, refs)
@@ -1919,7 +1919,7 @@ func (s *V1Service) generateCustomVideo(ctx context.Context, eventID string, mod
 		var data []byte
 		done, failover := func() (bool, bool) {
 			defer s.acctRelease(ctx, token.ID, eventID)
-			_ = s.events.SetAccount(ctx, eventID, token.ID)
+			_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 			_ = s.tokens.TouchLastUsed(ctx, token.ID)
 			baseURL := stringValue(token.Meta["base_url"])
 			d, url, genErr := s.custom.GenerateVideo(ctx, baseURL, token.Value, modelItem.ID, in.Prompt, size, durationSeconds, downloadResult)
@@ -2091,7 +2091,7 @@ func (s *V1Service) generateGrokVideo(ctx context.Context, eventID string, model
 		var data []byte
 		done, failover := func() (bool, bool) {
 			defer s.acctRelease(ctx, token.ID, eventID)
-			_ = s.events.SetAccount(ctx, eventID, token.ID)
+			_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 			_ = s.tokens.TouchLastUsed(ctx, token.ID)
 			d, meta, genErr := s.grok.GenerateVideo(ctx, token.Value, in.Prompt, aspectRatio, res, durationSeconds, frames, downloadResult)
 			if genErr == nil {
@@ -2193,7 +2193,7 @@ func (s *V1Service) generateRunwayImage(ctx context.Context, eventID string, mod
 		var data []byte
 		done, failover := func() (bool, bool) {
 			defer s.acctRelease(ctx, token.ID, eventID)
-			_ = s.events.SetAccount(ctx, eventID, token.ID)
+			_ = s.events.SetAccount(ctx, eventID, token.ID, token.AccountEmail)
 			_ = s.tokens.TouchLastUsed(ctx, token.ID)
 			teamID := ""
 			if token.Meta != nil {