diff --git a/api/resolvers/serial.js b/api/resolvers/serial.js
index 3ab93108..7e512a59 100644
--- a/api/resolvers/serial.js
+++ b/api/resolvers/serial.js
@@ -32,6 +32,9 @@ async function serialize (models, call) {
       if (error.message.includes('40001')) {
         throw new Error('wallet balance serialization failure - retry again')
       }
+      if (error.message.includes('23514')) {
+        bail(new Error('constraint failure'))
+      }
       bail(error)
     }
   }, {
diff --git a/prisma/migrations/20220827143828_positive_ints/migration.sql b/prisma/migrations/20220827143828_positive_ints/migration.sql
new file mode 100644
index 00000000..01867358
--- /dev/null
+++ b/prisma/migrations/20220827143828_positive_ints/migration.sql
@@ -0,0 +1,43 @@
+-- make sure integers/floats are positive (or null if optional)
+
+-- users
+ALTER TABLE users ADD CONSTRAINT "msats_positive" CHECK ("msats" >= 0) NOT VALID;
+ALTER TABLE users ADD CONSTRAINT "stackedMsats_positive" CHECK ("stackedMsats" >= 0) NOT VALID;
+ALTER TABLE users ADD CONSTRAINT "freeComments_positive" CHECK ("freeComments" >= 0) NOT VALID;
+ALTER TABLE users ADD CONSTRAINT "freePosts_positive" CHECK ("freePosts" >= 0) NOT VALID;
+ALTER TABLE users ADD CONSTRAINT "tipDefault_positive" CHECK ("tipDefault" >= 0) NOT VALID;
+
+-- upload
+ALTER TABLE "Upload" ADD CONSTRAINT "size_positive" CHECK ("size" >= 0) NOT VALID;
+ALTER TABLE "Upload" ADD CONSTRAINT "width_positive" CHECK ("width" IS NULL OR "width" >= 0) NOT VALID;
+ALTER TABLE "Upload" ADD CONSTRAINT "height_positive" CHECK ("height" IS NULL OR "height" >= 0) NOT VALID;
+
+-- earn
+ALTER TABLE "Earn" ADD CONSTRAINT "msats_positive" CHECK ("msats" >= 0) NOT VALID;
+
+-- invite
+ALTER TABLE "Invite" ADD CONSTRAINT "gift_positive" CHECK ("gift" IS NULL OR "gift" >= 0) NOT VALID;
+ALTER TABLE "Invite" ADD CONSTRAINT "limit_positive" CHECK ("limit" IS NULL OR "limit" >= 0) NOT VALID;
+
+-- item
+ALTER TABLE "Item" ADD CONSTRAINT "boost_positive" CHECK ("boost" >= 0) NOT VALID;
+ALTER TABLE "Item" ADD CONSTRAINT "minSalary_positive" CHECK ("minSalary" IS NULL OR "minSalary" >= 0) NOT VALID;
+ALTER TABLE "Item" ADD CONSTRAINT "maxSalary_positive" CHECK ("maxSalary" IS NULL OR "maxSalary" >= 0) NOT VALID;
+ALTER TABLE "Item" ADD CONSTRAINT "maxBid_positive" CHECK ("maxBid" IS NULL OR "maxBid" >= 0) NOT VALID;
+ALTER TABLE "Item" ADD CONSTRAINT "pollCost_positive" CHECK ("pollCost" IS NULL OR "pollCost" >= 0) NOT VALID;
+
+-- sub
+ALTER TABLE "Sub" ADD CONSTRAINT "baseCost_positive" CHECK ("baseCost" >= 0) NOT VALID;
+
+-- item_act
+ALTER TABLE "ItemAct" ADD CONSTRAINT "sats_positive" CHECK ("sats" >= 0) NOT VALID;
+
+-- invoice
+ALTER TABLE "Invoice" ADD CONSTRAINT "msatsRequested_positive" CHECK ("msatsRequested" >= 0) NOT VALID;
+ALTER TABLE "Invoice" ADD CONSTRAINT "msatsReceived_positive" CHECK ("msatsReceived" IS NULL OR "msatsReceived" >= 0) NOT VALID;
+
+-- withdrawl
+ALTER TABLE "Withdrawl" ADD CONSTRAINT "msatsPaying_positive" CHECK ("msatsPaying" >= 0) NOT VALID;
+ALTER TABLE "Withdrawl" ADD CONSTRAINT "msatsPaid_positive" CHECK ("msatsPaid" IS NULL OR "msatsPaid" >= 0) NOT VALID;
+ALTER TABLE "Withdrawl" ADD CONSTRAINT "msatsFeePaying_positive" CHECK ("msatsFeePaying" >= 0) NOT VALID;
+ALTER TABLE "Withdrawl" ADD CONSTRAINT "msatsFeePaid_positive" CHECK ("msatsFeePaid" IS NULL OR "msatsFeePaid" >= 0) NOT VALID;
\ No newline at end of file