Error using Meteor 1.2.1

[4Z4T4R]

The moment we execute the this single line of code on our Meteor Deployment...

RUnits = new SQL.Collection 'units'

We receive the following stacktrace in the Meteor logs:

I20160113-20:22:19.891(-8)? Exception in handling DDP message: TypeError: Cannot read property 'instance' of undefined
I20160113-20:22:19.891(-8)?     at Object.connection.registerStore.update (packages/storeness_meteor-postgres/packages/storeness_meteor-postgres.js:823:1)
I20160113-20:22:19.891(-8)?     at Object.store.(anonymous function) [as update] (packages/ddp-client/packages/ddp-client.js:1056:1)
I20160113-20:22:19.891(-8)?     at packages/ddp-client/packages/ddp-client.js:1836:1
I20160113-20:22:19.892(-8)?     at Array.forEach (packages/es5-shim/.npm/package/node_modules/es5-shim/es5-shim.js:417:1)
I20160113-20:22:19.892(-8)?     at Function._.each._.forEach (packages/underscore/packages/underscore.js:134:1)
I20160113-20:22:19.892(-8)?     at packages/ddp-client/packages/ddp-client.js:1835:1
I20160113-20:22:19.892(-8)?     at Function._.each._.forEach (packages/underscore/packages/underscore.js:142:1)
I20160113-20:22:19.892(-8)?     at [object Object]._.extend._livedata_data (packages/ddp-client/packages/ddp-client.js:1832:1)
I20160113-20:22:19.893(-8)?     at onMessage (packages/ddp-client/packages/ddp-client.js:862:1)
I20160113-20:22:19.893(-8)?     at runWithEnvironment (packages/meteor/dynamics_nodejs.js:110:1)
I20160113-20:22:19.893(-8)?     at packages/meteor/dynamics_nodejs.js:123:1
I20160113-20:22:19.893(-8)?     at packages/ddp-client/packages/ddp-client.js:253:1
I20160113-20:22:19.893(-8)?     at Array.forEach (packages/es5-shim/.npm/package/node_modules/es5-shim/es5-shim.js:417:1)
I20160113-20:22:19.893(-8)?     at Function._.each._.forEach (packages/underscore/packages/underscore.js:134:1)
I20160113-20:22:19.893(-8)?     at packages/ddp-client/packages/ddp-client.js:252:1
I20160113-20:22:19.894(-8)?     at packages/ddp-client/packages/ddp-client.js:228:1

Any idea why this error is showing up for this specific collection? What are the conditions of the Error thrown?