diff --git a/apps/api/src/ops/replication.service.ts b/apps/api/src/ops/replication.service.ts
index c872b06..2aa6e03 100644
--- a/apps/api/src/ops/replication.service.ts
+++ b/apps/api/src/ops/replication.service.ts
@@ -100,11 +100,7 @@ export class ReplicationService {
       return { ...empty, configured: true, problem: `No se pudo conectar: ${msg}` };
     }
 
-    const field = (name: string): string | null => {
-      const m = raw.match(new RegExp(`^\\s*${name}:\\s*(.*)$`, "m"));
-      const v = m?.[1]?.trim();
-      return v === undefined || v === "" ? null : v;
-    };
+    const field = (name: string): string | null => replicaField(raw, name);
 
     // An empty result set means the server is not configured as a replica at
     // all — distinct from "configured but broken", and worth saying plainly.
@@ -151,3 +147,25 @@ export class ReplicationService {
     };
   }
 }
+
+/**
+ * Read one field out of `SHOW REPLICA STATUS\G` output.
+ *
+ * Exported for testing, and worth testing: the obvious regex is wrong.
+ * `\s` matches newlines in JavaScript, so `^\s*NAME:\s*(.*)$` lets the `\s*`
+ * after the colon swallow the line break of an EMPTY field and capture the
+ * following line instead. Last_SQL_Error is empty on a healthy replica, so that
+ * version reported the next line ("Replicate_Ignore_Server_Ids:") as a SQL
+ * error and rendered a perfectly healthy replica as broken.
+ *
+ * Hence `[^\S\n]` — horizontal whitespace only — on both sides of the name.
+ *
+ * @returns the trimmed value, or null when the field is absent OR empty. Empty
+ *          and absent mean the same thing to every caller here: MySQL prints
+ *          error fields as blank rather than omitting them.
+ */
+export function replicaField(raw: string, name: string): string | null {
+  const m = raw.match(new RegExp(`^[^\\S\\n]*${name}:[^\\S\\n]*(.*)$`, "m"));
+  const v = m?.[1]?.trim();
+  return v === undefined || v === "" ? null : v;
+}
diff --git a/apps/api/src/ops/replication.spec.ts b/apps/api/src/ops/replication.spec.ts
new file mode 100644
index 0000000..9d75304
--- /dev/null
+++ b/apps/api/src/ops/replication.spec.ts
@@ -0,0 +1,87 @@
+import { replicaField } from "./replication.service";
+
+/**
+ * Verbatim shape of `SHOW REPLICA STATUS\G` from the live replica, trimmed to
+ * the fields the panel reads plus the neighbours that matter.
+ *
+ * The empty `Last_SQL_Error:` immediately followed by
+ * `Replicate_Ignore_Server_Ids:` is the whole point of the fixture — that exact
+ * adjacency is what the first implementation misread.
+ */
+const HEALTHY = [
+  "*************************** 1. row ***************************",
+  "             Replica_IO_State: Waiting for source to send event",
+  "                  Source_Host: 100.103.77.46",
+  "                  Source_User: repl",
+  "           Replica_IO_Running: Yes",
+  "          Replica_SQL_Running: Yes",
+  "              Replicate_Do_DB: ",
+  "                   Last_Errno: 0",
+  "                   Last_Error: ",
+  "        Seconds_Behind_Source: 0",
+  "                Last_IO_Errno: 0",
+  "                Last_IO_Error: ",
+  "               Last_SQL_Errno: 0",
+  "               Last_SQL_Error: ",
+  "  Replicate_Ignore_Server_Ids: ",
+  "             Source_Server_Id: 1",
+].join("\n");
+
+const BROKEN = [
+  "           Replica_IO_Running: Yes",
+  "          Replica_SQL_Running: No",
+  "        Seconds_Behind_Source: NULL",
+  "                Last_IO_Error: ",
+  "               Last_SQL_Error: Could not execute Write_rows event on table jorgecuadros.customers",
+  "  Replicate_Ignore_Server_Ids: ",
+].join("\n");
+
+describe("replicaField", () => {
+  it("reads plain values", () => {
+    expect(replicaField(HEALTHY, "Replica_IO_Running")).toBe("Yes");
+    expect(replicaField(HEALTHY, "Replica_SQL_Running")).toBe("Yes");
+    expect(replicaField(HEALTHY, "Source_Host")).toBe("100.103.77.46");
+    expect(replicaField(HEALTHY, "Seconds_Behind_Source")).toBe("0");
+  });
+
+  /**
+   * The regression this file exists for. `\s` matches newlines in JavaScript,
+   * so `^\s*NAME:\s*(.*)$` walks past an empty field's line break and captures
+   * the NEXT line — turning a healthy replica into
+   * "Error SQL: Replicate_Ignore_Server_Ids:" in the admin panel.
+   */
+  it("returns null for an empty field instead of the following line", () => {
+    expect(replicaField(HEALTHY, "Last_SQL_Error")).toBeNull();
+    expect(replicaField(HEALTHY, "Last_IO_Error")).toBeNull();
+    expect(replicaField(HEALTHY, "Last_Error")).toBeNull();
+    expect(replicaField(HEALTHY, "Replicate_Do_DB")).toBeNull();
+    expect(replicaField(HEALTHY, "Replicate_Ignore_Server_Ids")).toBeNull();
+  });
+
+  it("still reads a real error when there is one", () => {
+    expect(replicaField(BROKEN, "Last_SQL_Error")).toBe(
+      "Could not execute Write_rows event on table jorgecuadros.customers",
+    );
+    expect(replicaField(BROKEN, "Replica_SQL_Running")).toBe("No");
+  });
+
+  /** NULL is a distinct state from empty and must survive as the literal. */
+  it("preserves the literal NULL that MySQL prints for unknown lag", () => {
+    expect(replicaField(BROKEN, "Seconds_Behind_Source")).toBe("NULL");
+  });
+
+  it("returns null for a field that is not present at all", () => {
+    expect(replicaField(HEALTHY, "Nonexistent_Field")).toBeNull();
+  });
+
+  /**
+   * Field names are matched at the start of a line. Without the line anchor,
+   * "Last_Error" would also match inside "Last_SQL_Error" and read the wrong
+   * value — the two carry different things and both feed the panel.
+   */
+  it("does not match a field name that is a suffix of another", () => {
+    const raw = "               Last_SQL_Error: boom\n                   Last_Error: ";
+    expect(replicaField(raw, "Last_Error")).toBeNull();
+    expect(replicaField(raw, "Last_SQL_Error")).toBe("boom");
+  });
+});