diff --git a/bios/Sony/PlayStation 2/.variants/ROM2.BIN.5d5ab431 b/bios/Galaksija/ROM2.BIN
similarity index 100%
rename from bios/Sony/PlayStation 2/.variants/ROM2.BIN.5d5ab431
rename to bios/Galaksija/ROM2.BIN
diff --git a/scripts/common.py b/scripts/common.py
index 17d52709..ef8ade3b 100644
--- a/scripts/common.py
+++ b/scripts/common.py
@@ -1298,6 +1298,16 @@ def runs_standalone(
     )
 
 
+# What identifies a profile entry's content, carried unchanged wherever the
+# entry travels (cross-reference report, core extras, second-pass copies).
+# Each copy once kept its own subset: np2kai's bios.rom lost min_size and
+# validation on the way and resolved to an IBM PCjr ROM of the same name.
+PROFILE_IDENTITY_FIELDS = (
+    "sha1", "md5", "sha256", "crc32", "size", "min_size", "max_size",
+    "validation", "aliases", "unsourceable",
+)
+
+
 def upstream_profile_index(
     profiles: dict[str, dict], include_aliases: bool = False
 ) -> dict[str, set[str]]:
diff --git a/scripts/packextras.py b/scripts/packextras.py
index 239d9a7d..7b284434 100644
--- a/scripts/packextras.py
+++ b/scripts/packextras.py
@@ -6,6 +6,7 @@ this module builds so the report and the pack withdraw the same files."""
 
 from __future__ import annotations
 
+from common import PROFILE_IDENTITY_FIELDS
 from common import expand_platform_declared_names
 from common import load_emulator_profiles
 from common import resolution_is_hash_exact
@@ -442,7 +443,7 @@ def _collect_emulator_extras(
         # validation block; dropping those fields here would let a same-named
         # but different payload enter a generated pack.
         expected = u.get("expected") or {}
-        for identity in ("sha1", "md5", "sha256", "crc32", "size"):
+        for identity in PROFILE_IDENTITY_FIELDS:
             declared = u.get(identity)
             if declared in (None, "", []):
                 declared = expected.get(identity)
@@ -527,7 +528,7 @@ def _collect_emulator_extras(
             # The same identity the first pass carries: without it the copy
             # resolves on its name alone and a same-named file of another
             # game fills the slot the profile marks as not held.
-            for identity in ("sha1", "md5", "sha256", "crc32", "size", "unsourceable"):
+            for identity in PROFILE_IDENTITY_FIELDS:
                 if f.get(identity) not in (None, "", []):
                     extra[identity] = f[identity]
             extras.append(extra)
diff --git a/scripts/verify.py b/scripts/verify.py
index ea1a369c..d4da377c 100644
--- a/scripts/verify.py
+++ b/scripts/verify.py
@@ -34,6 +34,7 @@ import slots
 
 sys.path.insert(0, os.path.dirname(__file__))
 from common import (
+    PROFILE_IDENTITY_FIELDS,
     build_target_cores_cache,
     build_zip_contents_index,
     check_inside_zip,
@@ -602,6 +603,11 @@ def find_undeclared_files(
                     "checks": sorted(checks) if checks else [],
                     "source_ref": f.get("source_ref"),
                     "expected": _build_expected(f, checks),
+                    **{
+                        field: f.get(field)
+                        for field in PROFILE_IDENTITY_FIELDS
+                        if f.get(field) not in (None, "", [])
+                    },
                     "sha1": f.get("sha1"),
                     "md5": f.get("md5"),
                 }
diff --git a/tests/test_extra_identity.py b/tests/test_extra_identity.py
new file mode 100644
index 00000000..95b2a1eb
--- /dev/null
+++ b/tests/test_extra_identity.py
@@ -0,0 +1,67 @@
+"""A core extra keeps every field that identifies its content.
+
+Each hop kept its own subset: min_size and validation were lost, so
+np2kai's bios.rom (98304 bytes minimum, size checked) resolved by name to an
+IBM PCjr ROM and shipped in four packs, and dosbox's SC-55 ROMs to a
+Galaksija ROM and a PS2 ROM2.BIN.
+"""
+
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT / "scripts"))
+
+from common import PROFILE_IDENTITY_FIELDS  # noqa: E402
+
+ENTRY = {
+    "name": "bios.rom",
+    "path": "np2kai/bios.rom",
+    "min_size": 98304,
+    "validation": ["size"],
+    "aliases": ["BIOS.ROM"],
+    "crc32": "12345678",
+}
+
+
+class IdentityTravels(unittest.TestCase):
+    def test_report_and_extra_keep_every_identity_field(self):
+        from packextras import _collect_emulator_extras
+        from verify import find_undeclared_files
+
+        profile = {
+            "emulator": "NP2kai",
+            "type": "libretro",
+            "systems": ["nec-pc-98"],
+            "files": [dict(ENTRY)],
+        }
+        config = {"cores": ["np2kai"], "systems": {}}
+        db = {
+            "files": {"s1": {"name": "bios.rom", "path": "bios/NEC/PC-98/bios.rom",
+                             "size": 100000, "sha1": "s1", "md5": "m1", "crc32": "12345678"}},
+            "indexes": {"by_name": {"bios.rom": ["s1"]}, "by_md5": {"m1": "s1"},
+                        "by_crc32": {"12345678": "s1"}},
+        }
+        report = find_undeclared_files(config, "emulators", db, emu_profiles={"np2kai": profile})
+        extras = _collect_emulator_extras(
+            config, "emulators", db, set(), "", {"np2kai": profile}, include_all=True
+        )
+        for label, item in (("report", report[0]), ("extra", extras[0])):
+            for field in ("min_size", "validation", "aliases", "crc32"):
+                with self.subTest(where=label, field=field):
+                    self.assertEqual(item.get(field), ENTRY[field])
+
+    def test_every_hop_reads_the_shared_list(self):
+        for name in ("packextras.py", "verify.py"):
+            source = (REPO_ROOT / "scripts" / name).read_text(encoding="utf-8")
+            with self.subTest(module=name):
+                self.assertIn("PROFILE_IDENTITY_FIELDS", source)
+                self.assertNotIn('("sha1", "md5", "sha256", "crc32", "size"', source)
+        self.assertIn("validation", PROFILE_IDENTITY_FIELDS)
+
+
+if __name__ == "__main__":
+    unittest.main()