PostgreSQL Sequence Out of Sync After Manual Insert
When a PostgreSQL sequence falls out of sync — typically after manually inserting a row with an explicit ID — the database's auto-increment counter doesn't...
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Postgres "Relation Does Not Exist" Error Fix
The "relation does not exist" error in PostgreSQL doesn't necessarily mean the table was never created — it very often means Postgres is looking in the wrong...
Docker Image Size Too Large, How to Reduce It
A bloated Docker image isn't usually caused by your application code — it's almost always the base image choice, unnecessary build tools left in the final...
API Returning 401 With Valid Bearer Token
When an API returns 401 Unauthorized despite a token that looks correct and unexpired, the issue is almost always in how the token is being sent or read, not...
Burp Suite Not Intercepting HTTPS Traffic
When Burp Suite intercepts plain HTTP traffic fine but HTTPS requests fail, hang, or simply never appear in the proxy history, it's almost always because the...
"Connection Reset" Testing API With Burp Proxy
A "connection reset" specifically while routing API requests through Burp usually means the TLS handshake between Burp and the target server is failing —...
CORS vs CSRF, What's the Actual Difference
CORS and CSRF get confused constantly because they both involve cross-origin requests and both show up in the same part of the stack — but they solve...
MySQL Character Encoding Showing Question Marks
Question marks (or garbled characters like ’) appearing instead of accented letters, emoji, or other special characters almost always means there's a...
MySQL Deadlock Found When Trying to Get Lock
A deadlock in MySQL happens when two transactions each hold a lock the other one needs, and neither can proceed — MySQL detects this automatically and kills...