Historical sessions disappear - Expected a string starting with "ses", got "dummy" error #28486

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1. github-actions

   assigned

   rekram1-node

   on May 20, 2026
2. github-actions commented on May 20, 2026

   

   github-actionsBot

   on May 20, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • Sessions and auth state lost after auto-upgrade from 1.15.0 to 1.15.1 #27859: Sessions and auth state lost after auto-upgrade (similar symptom of session history disappearing after upgrade)
   • Upgrading to 1.14.20 looses session history #23814: Upgrading to 1.14.20 loses session history (similar symptom of empty session list after upgrade)
   • [Bug] Tauri v1 migration silently discards all historical session data in workspace .dat files #27431: Tauri v1 migration silently discards all historical session data (most similar — session data present in storage but not visible in UI after upgrade)

   If your issue is the same root cause, consider adding a comment there instead. If the specific Expected a string starting with "ses", got "dummy" error is distinct from those issues, this report is still valuable — please add any additional reproduction details if possible.
3. HaleTom commented on Jun 22, 2026

   

   HaleTom

   on Jun 22, 2026

   Last edited by HaleTom

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   Also on Linux:

   

   [11:38:28.948] ERROR (#12432): failed {
     ref: "err_a0da1bb9",
     error: 20 | }`:Y.stack).join(`
   21 | `),kT=(X,Y)=>{let Q=X.stack.split(`
   22 | `),J=`${Y}[cause]: ${Q[0]}`;for(let G=1,$=Q.length;G<$;G++)J+=`
   23 | ${Y}${Q[G]}`;if(X.cause)J+=` {
   24 | ${kT(X.cause,`${Y}  `)}
   25 | ${Y}}`;return J},K3=`~effect/Fiber/${NH}`,an={_A:C,_E:C},sn={id:0},z5=()=>globalThis[zY];class NU{constructor(X,Y=!0){this[K3]=an,this.setContext(X),this.id=++sn.id,this.currentOpCount=0,this.currentLoopCount=0,this.interruptible=Y,this._stack=[],this._observers=[],this._exit=void 0,this._children=void 0,this._interruptedCau                   l             ▄     timeMetrics?.recordFiberStart(this.context)}[K3];id;interruptible;currentOpCount;currentLoopCount;_st▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▄t▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀dren;_interruptedCause;_yielded;context;currentScheduler;currentTracerContext;currentSpan;currentLogL▀  ▀ ▀  ▀ ▀▀▀▀ ▀  ▀l▀    ▀  ▀ ▀  ▀ ▀▀▀▀runtimeMetrics;maxOpsBeforeYield;currentPreventYield;_dispatcher=void 0;get currentDispatcher(){retur▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀?▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀ler.makeDispatcher()}getRef(X){return oD(this.context,X)}addObserver(X){if(this._exit)return X(this._exit),S8;return this._observers.push(X),()=>{let Y=this._observers.indexOf(X);if(Y>=0)this._observers.splice(Y,1)}}interruptUnsafe(X,Y){if | ... truncated
                                    ┃
   error: Expected a string starting┃  Ask anything... "Fix broken tests"
         at /$bunfs/root/chunk-62436┃
         at /$bunfs/root/chunk-62436┃  Build · Nano Banana Pro Google
         at /$bunfs/root/chunk-e6zcx╹▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
         at ~effect/Effect/successCont (/$bunfs/root/chunk-624361m2.js:25:7810)     tab agents  ctrl+p commands
         at runLoop (/$bunfs/root/chunk-624361m2.js:25:2045)
         at evaluate (/$bunfs/root/chunk-624361m2.js:25:1435)
         at /$bunfs/root/chunk-624361m2.js:25:24625
         at /$bunfs/root/chunk-1nd8bv6q.js:6:19813
         at new Promise (native:1:11)
         at /$bunfs/root/chunk-1nd8bv6q.js:6:19683
         at fetch (/$bunfs/root/src/cli/tui/worker.js:2:4884)
         at /$bunfs/root/chunk-h00e7vhw.js:2:330
   ,
     cause: "Error: Expected a string starting with \"ses\", got \"dummy\"\n    at <anonymous> (/$bunfs/root/chunk-624361m2.js:25:10206)\n    at <anonymous> (/$bunfs/root/chunk-624361m2.js:33:21251)\n    at <anonymous> (/$bunfs/root/chunk-e6zcxa2p.js:2:109603) {\n  [cause]: Error: Expected a string starting with \"ses\", got \"dummy\"\n}",
   } ~/code/aur/aurscan-manticore:master                                                                                               1.17.9
   
   

   👍React with 👍1Reacted by Dmitrii Stepanidenko
4. HaleTom commented on Jun 22, 2026

   

   HaleTom

   on Jun 22, 2026

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   Related:

   • TUI shows server error on --continue --fork: Expected a string starting with "ses", got "dummy" #29262 — TUI shows server error on --continue --fork: Expected a string starting with "ses", got "dummy" #29262
   • TUI hangs in infinite render loop after auto-resume abort fails with session ID parse error #29868 — TUI hangs in infinite render loop after auto-resume abort fails with session ID parse error #29868
   • Session routes throw raw ParseError when id carries opencode: deep-link scheme prefix (opencode%3Ases_...) #31145 — Session routes throw raw ParseError when id carries opencode: deep-link scheme prefix (opencode%3Ases_...) #31145

   👍React with 👍1Reacted by Dmitrii Stepanidenko
5. github-actions commented on Aug 22, 2026

   

   github-actionsBot

   on Aug 22, 2026 – with GitHub Actions

   Contributor

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   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
6. github-actions

   closed this as not plannedon Aug 22, 2026
7. digglife commented on Sep 19, 2026

   

   digglife

   on Sep 19, 2026

   Last edited by digglife

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   seems still an issue here. I didn't upgrade recently, where should I investigate? Judging from the sqlite database size, the message data is still there.

   EDIT: the message data is ok but the session table is empty now. Guess that's the reason.

   👍React with 👍1Reacted by Santiago Bernhardt
8. sbe-arg commented on Sep 22, 2026

   

   sbe-arg

   on Sep 22, 2026

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   where should I investigate? Judging from the sqlite database size, the message data is still there.

   i have the same problem when I empty the session list for a workspace