diff --git a/routes/operations.js b/routes/operations.js
index d1ee846..4d901be 100644
--- a/routes/operations.js
+++ b/routes/operations.js
@@ -905,7 +905,7 @@ module.exports = function(pool) {
                 for (const unit of units) {
                     const incr = await resolveIncrs(client, ctx, unit.where, excludeClause, req.body);
                     // no rows, or already at the target — nothing to write for this slice
-                    if (incr.value === 0 && incr.units === 0) { skipped.push(...unit.slices); continue; }
+                    if (incr.value === 0 && incr.units === 0) { for (const s of unit.slices) skipped.push(s); continue; }
                     applied++;
 
                     const loggedSlice = unit.slices.length === 1 ? unit.slices[0] : unit.slices;
@@ -933,7 +933,7 @@ module.exports = function(pool) {
                     for (const r of result.rows) {
                         if (r.pf_logid != null) sqlByLogId.set(r.pf_logid, sql);
                     }
-                    allRows.push(...result.rows);
+                    for (const r of result.rows) allRows.push(r);
                 }
 
                 if (allRows.length === 0) {
@@ -1041,7 +1041,7 @@ module.exports = function(pool) {
                     for (const r of result.rows) {
                         if (r.pf_logid != null) sqlByLogId.set(r.pf_logid, sql);
                     }
-                    allRows.push(...result.rows);
+                    for (const r of result.rows) allRows.push(r);
                 }
                 // Every coordinate in the selection nets to zero -- nothing to move.
                 // Refused like scale's no-op rather than committing an empty log
@@ -1161,7 +1161,7 @@ module.exports = function(pool) {
                     for (const r of result.rows) {
                         if (r.pf_logid != null) sqlByLogId.set(r.pf_logid, sql);
                     }
-                    allRows.push(...result.rows);
+                    for (const r of result.rows) allRows.push(r);
                 }
                 await client.query('COMMIT');
                 committed = true;