diff --git a/core/internal/server/sysupdate/backend_dnf.go b/core/internal/server/sysupdate/backend_dnf.go
index 049399158..34bb55bc2 100644
--- a/core/internal/server/sysupdate/backend_dnf.go
+++ b/core/internal/server/sysupdate/backend_dnf.go
@@ -115,6 +115,7 @@ func parseDnfList(text, backendID string, installed map[string]string) []Package
 		return nil
 	}
 	var pkgs []Package
+	seen := make(map[string]struct{})
 	for line := range strings.SplitSeq(text, "\n") {
 		fields := strings.Fields(line)
 		if len(fields) < 2 {
@@ -129,6 +130,12 @@ func parseDnfList(text, backendID string, installed map[string]string) []Package
 		if !looksLikeRpmVersion(version) {
 			continue
 		}
+		// dnf prints one row per (package, repo), so one version in two repos appears twice
+		key := nameArch + "\t" + version
+		if _, dup := seen[key]; dup {
+			continue
+		}
+		seen[key] = struct{}{}
 		name := nameArch[:dot]
 		pkgs = append(pkgs, Package{
 			Name:        nameArch,
diff --git a/core/internal/server/sysupdate/backend_dnf_test.go b/core/internal/server/sysupdate/backend_dnf_test.go
index 29680de2e..5082292c5 100644
--- a/core/internal/server/sysupdate/backend_dnf_test.go
+++ b/core/internal/server/sysupdate/backend_dnf_test.go
@@ -55,6 +55,32 @@ bash.x86_64       5.2.40-1.fc41       updates`,
 			backendID: "dnf",
 			want:      nil,
 		},
+		{
+			name: "one package offered by two repos is reported once",
+			input: `dms-greeter.x86_64   1.5.1-1.fc44   copr:copr.fedorainfracloud.org:avengemedia:danklinux
+dms-greeter.x86_64   1.5.1-1.fc44   coprdep:copr.fedorainfracloud.org:avengemedia:danklinux`,
+			backendID: "dnf5",
+			installed: map[string]string{"dms-greeter": "1.5.0-1.fc44"},
+			want: []Package{
+				{Name: "dms-greeter.x86_64", Repo: RepoSystem, Backend: "dnf5", FromVersion: "1.5.0-1.fc44", ToVersion: "1.5.1-1.fc44"},
+			},
+		},
+		{
+			name: "duplicate rows do not suppress other packages or differing versions",
+			input: `bash.x86_64      5.2.40-1.fc41   updates
+bash.x86_64      5.2.40-1.fc41   fedora
+bash.i686        5.2.40-1.fc41   updates
+kernel.x86_64    6.14.2-1.fc41   updates
+kernel.x86_64    6.14.3-1.fc41   updates`,
+			backendID: "dnf5",
+			installed: map[string]string{"bash": "5.2.39-1.fc41", "kernel": "6.14.1-1.fc41"},
+			want: []Package{
+				{Name: "bash.x86_64", Repo: RepoSystem, Backend: "dnf5", FromVersion: "5.2.39-1.fc41", ToVersion: "5.2.40-1.fc41"},
+				{Name: "bash.i686", Repo: RepoSystem, Backend: "dnf5", FromVersion: "5.2.39-1.fc41", ToVersion: "5.2.40-1.fc41"},
+				{Name: "kernel.x86_64", Repo: RepoSystem, Backend: "dnf5", FromVersion: "6.14.1-1.fc41", ToVersion: "6.14.2-1.fc41"},
+				{Name: "kernel.x86_64", Repo: RepoSystem, Backend: "dnf5", FromVersion: "6.14.1-1.fc41", ToVersion: "6.14.3-1.fc41"},
+			},
+		},
 		{
 			name: "skips dnf5 banner / column header lines",
 			input: `Updates available