Multiple Users Editing Same Record Overwrite Each Other
When two team members edit the same record simultaneously in your Base44 app, the last person to save silently overwrites the first person's changes. There's no warning, no conflict detection, and no way to merge changes. Data is lost without anyone knowing until someone notices their edits disappeared.
This is a critical problem for team-oriented Base44 apps: CRM systems where multiple sales reps update the same contact, project management tools where team members update task details, and inventory systems where multiple warehouse staff modify stock counts.
The damage is often invisible. Users make changes they believe are saved, make decisions based on those changes, and only discover days later that their edits were overwritten by a colleague who was editing at the same time.
Error Messages You Might See
Common Causes
- Last-write-wins with no versioning — The app saves the full record on every edit, overwriting all fields including ones the user didn't change
- No optimistic locking — There's no version number or timestamp check to detect when a record was modified by someone else between load and save
- No real-time presence indicators — Users don't know someone else is editing the same record
- Full record saves instead of field-level patches — Saving updates all fields, not just the ones the user changed, maximizing the chance of overwriting
- No edit locking mechanism — There's no way to 'lock' a record while editing to prevent concurrent modifications
How to Fix It
- Add optimistic locking — Store a version number or updated_at timestamp on each record. Before saving, check that the version matches what was loaded. If not, warn the user
- Show who's currently editing — Display a real-time indicator when another user has the same record open for editing
- Use field-level patches — Only save the fields the user actually changed, not the entire record, to minimize conflicts
- Implement conflict resolution UI — When a conflict is detected, show the user both versions and let them choose which changes to keep
- Add edit locking — When a user opens a record for editing, lock it for other users with a timeout (e.g., 5 minutes)
Real developers can help you.
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
Cursor ambassador and agentic tooling builder.
I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti.
I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks.
https://blog.vtemian.com/
PawelPloszaj
I'm fronted developer with 10+ years of experience with big projects. I have small backend background too
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
Matt Butler
Software Engineer @ AWS
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Meïr Ankri
Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I prevent users from overwriting each other's changes?
Add a version number or updated_at timestamp to your records. Before saving, check that the version hasn't changed since the user loaded the record. If it has, show a conflict warning and let the user review the other person's changes.
Is real-time collaborative editing possible in Base44?
Full real-time collaboration (like Google Docs) requires WebSocket connections and operational transforms, which is complex. A simpler approach is showing who's currently editing a record and using optimistic locking to detect and resolve conflicts at save time.