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Three different SQL Server errors, one root cause: your migration files and the __EFMigrationsHistory table disagree about what has been applied. Here is the query that shows you the disagreement, and the fix for each of the three ways it happens.
You deployed, the database says the change is there, and the live page still shows the old content. Before you start debugging, send one request and read a single header. It will tell you which of two completely different problems you have.
Every guide to deploying ASP.NET Core on Plesk stops at "dotnet publish and upload the folder". Mine all went wrong after that step. Here are the five errors in the order you meet them, and what each one actually means.
Most guides to running Next.js on IIS assume a VPS you control and a reverse proxy to PM2. On Plesk shared Windows hosting you have neither. Here is the setup that works, and the four failures that cost me the most time.
A production build baked http://localhost:5080 into the live bundle. The cause was a .env.local file that Next.js loads during next build and ranks above .env.production. Here is the precedence order, a ten-line way to prove it on your own project, and the rename that fixes it permanently.
A 202 from IndexNow is a receipt, not a confirmation - an invalid key returns the same thing. Real status codes from wiring it into a live site, what Google does with IndexNow, and how to check yours in two minutes.
Two months of real numbers from one small site: what GA4's AI Assistant channel shows, why September's 'ChatGPT matches Google' did not survive October, and how to build an AI traffic report that catches more sources.
An index is how reads survive scale; idempotency is how writes survive retries. What each one fixes, why composite column order decides everything, why an idempotency key needs a UNIQUE constraint, and the migration-history failure where both ideas meet.
Move an ASP.NET MVC app to React or Next.js without forking the database or freezing the old site: the shared data layer, the EF migration trap, and the IIS deploy that silently does nothing.
What the evidence says about being quoted in AI answers: how pages get retrieved and cited, what genuinely moves the needle, what makes no difference at all - including a file I added to this site anyway - and how to measure it.
What website maintenance really includes, what each price level buys, the checklist you can run yourself for free, and the questions to ask before signing a monthly plan.
Failing Core Web Vitals? The 2026 thresholds for LCP, INP and CLS, why most sites fail them, and the fixes a developer applies first - in the order that moves the numbers most.
