Record a change to the sample's weight on hand.

The first adjustment is taken as the sample's initial weight on hand; every
later adjustment appends to a log of alterations over time. An
amount_changed of 0 records nothing and simply returns the current weight.

unit must be g or units, and change_reason must be an integer from the
enum below.

Change reasons

Unless the lab reports to a regulator, change_reason uses this default enum:

• 0 other
• 1 initial
• 2 destroyed
• 3 used
• 4 returned
• 5 lost
• 6 stolen
• 7 addition

Labs in a METRC state should use a reason from their own state's list instead.
Reasons outside a state's list are accepted without error, but the weight change
may reach METRC incorrectly. 0 is an allowable value everywhere; in most
states it is not forwarded to METRC at all.

• METRC CA
  • 0 other (Allowable value, not sent to METRC)
  • 2 Scale Variance
  • 3 Sample Tested
  • 106 Sample Tested
  • 101 Waste (Unusable Product)
  • 108 Damage
  • 215 Enforcement Testing
  • 107 Incorrect Quantity
  • 214 Male Plants
  • 213 Mandated Destruction
  • 212 Onsite Testing
  • 211 Over Pulled
  • 210 Research & Development
  • 105 Scale Variance
  • 209 Spoilage
  • 104 State-Authorized Adjustment
  • 103 Theft
  • 208 Trade Sample
  • 207 Under Pulled
  • 102 Voluntary Surrender
  • 206 Weight Change Due to Moisture
• METRC IL
  • 0 other (Allowable value, not sent to METRC)
  • 288 Consumed During Testing
  • 287 Entry Error
  • 290 Inventory Audit
  • 286 Package Material
  • 285 Scale Variance
  • 284 Spoilage
  • 283 Theft
  • 282 Waste
• METRC LA
  • 0 other (Allowable value, not sent to METRC)
  • 111 Test Sample Waste (Lab only)
  • 116 Potency Testing
  • 122 Contaminant Testing
  • 121 Drying
  • 120 During Transfer
  • 119 Entry Error
  • 118 Package Material
  • 117 Plants Unpacked
  • 115 R&D Testing
  • 114 Scale Variance
  • 113 Spoilage
  • 112 State-Ordered Destruction/State Mandated Destruction
  • 110 Theft
  • 109 Waste
• METRC MA
  • 0 other (Allowable value, not sent to METRC)
  • 2 Test Sample Destruction
  • 3 Sample Used During Testing
  • 5 Waste
  • 128 Sample Used During Testing
  • 125 Test Sample Destruction
  • 135 API Related Error
  • 134 Drying
  • 133 Entry Error
  • 132 Over/Under Pulled
  • 131 Package Material
  • 130 Plants Unpacked
  • 129 Processing Loss
  • 127 Scale Variance
  • 126 Spoilage
  • 124 Theft
  • 123 Waste
• METRC MD
  • 0 other (Allowable value, not sent to METRC)
  • 2 Drying
  • 3 Waste
  • 5 Spoilage
  • 136 Waste
  • 139 Scale Variance
  • 144 API Adjustment Error
  • 143 Drying
  • 142 Entry Error
  • 141 MCA Inspector Obtained Product
  • 140 Plants Unpacked
  • 138 Spoilage
  • 137 Theft
  • 263 Unaccounted Product
• METRC ME
  • 0 other (Allowable value, not sent to METRC)
  • 151 Sample Used During Testing
  • 147 Test Sample Destruction
  • 156 API Related Error
  • 155 Drying
  • 154 Entry Error
  • 153 Over/Under Pulled
  • 152 R&D Sample
  • 150 Scale Variance
  • 149 Spoilage
  • 148 State Mandated Destruction
  • 146 Theft
  • 145 Waste
• METRC MI
  • 0 other (Allowable value, not sent to METRC)
  • 3 Waste
  • 6 Scale Variance
  • 157 Waste
  • 159 Spoilage
  • 162 Drying
  • 161 Entry Error
  • 160 Scale Variance
  • 158 Theft
• METRC MN
  • 0 other (Allowable value, not sent to METRC)
  • 170 Consumed During Testing
  • 164 Test Sample Destruction
  • 169 Drying
  • 168 Entry Error
  • 295 Hazardous Waste
  • 294 Non-Hazardous Waste
  • 167 Package Material
  • 307 Quantity Discrepancy
  • 165 Spoilage
  • 306 State Investigation
  • 163 Theft
  • 293 Waste
• METRC MO
  • 0 other (Allowable value, not sent to METRC)
  • 182 Consumed During Testing
  • 171 Waste
  • 183 API Error
  • 181 Damaged
  • 180 Drying
  • 179 Mandatory State Destruction
  • 178 Moisture Weight Change
  • 177 Over/Under Pulled
  • 176 Package Material
  • 175 Recall
  • 174 Spoilage
  • 173 Theft
  • 172 Typing Error
• METRC MS
  • 0 other (Allowable value, not sent to METRC)
  • 281 Drying
  • 280 During Transfer
  • 279 Entry Error
  • 278 Package Material
  • 277 Scale Variance
  • 276 Spoilage
  • 275 Theft
  • 274 Waste
• METRC MT
  • 0 other (Allowable value, not sent to METRC)
  • 247 Contaminant Testing
  • 240 Waste
  • 246 Drying
  • 245 Entry Error
  • 244 Scale Variance
  • 243 Spoilage
  • 242 State Mandated Destruction
  • 241 Theft
• METRC NJ
  • 0 other (Allowable value, not sent to METRC)
  • 190 Consumed During Testing
  • 184 Waste
  • 189 Drying
  • 308 Enforcement Investigation
  • 188 Entry Error
  • 187 Scale Variance
  • 186 Spoilage
  • 185 Theft
• METRC NV
  • 0 other (Allowable value, not sent to METRC)
  • 2 Package Destruction/Waste
  • 3 Test Sample Consumed in Testing
  • 4 Entry Error
  • 5 Nevada Dept.of Agriculture
  • 6 Scale Variance
  • 251 Test Sample Consumed in Testing
  • 255 Package Destruction/Waste
  • 292 API Adjustment Error
  • 259 Drying
  • 258 Entry Error
  • 257 Nevada Dept.of Agriculture
  • 256 Over Pulled
  • 254 Plants Unpacked
  • 253 Scale Variance
  • 252 Spoilage
  • 250 Theft
  • 249 Transfer Error
  • 291 Unaccounted Product Variance
  • 248 Under Pulled
• METRC NY
  • 0 other (Allowable value, not sent to METRC)
  • 305 Consumed During Testing
  • 298 Waste
  • 304 Damage During Transfer
  • 303 Drying
  • 302 Entry Error
  • 301 Scale Variance
  • 300 Spoilage
  • 299 Theft
• METRC OH
  • 0 other (Allowable value, not sent to METRC)
  • 2 Laboratory Testing
  • 3 Destruction - Waste/Other
  • 5 Laboratory Testing
  • 6 Plant Material - Moisture Gain/Loss
  • 194 Laboratory Testing
  • 195 Destruction - Waste/Other
  • 199 Data Entry Error
  • 198 Destruction - Expired
  • 197 Destruction - Failed Testing
  • 196 Destruction - Recall
  • 297 Inventory Reconciliation
  • 296 Loss, Theft, or Diversion
  • 192 Plant Material - Moisture Gain/Loss
  • 191 Scale Variance
• METRC OK
  • 0 other (Allowable value, not sent to METRC)
  • 220 Sample Used During Testing
  • 224 Contaminant Testing
  • 225 API Related Error
  • 223 Damage/Spoilage
  • 222 Drying
  • 221 Mandatory State Destruction
  • 219 Scale Variance
  • 218 Test Sample Destruction
  • 217 Theft
  • 216 Typing/Entry Error
• METRC OR
  • 0 Moisture Loss/Gain
  • 2 Sample Destroyed (Lab Use Only)
  • 3 Waste
  • 231 Sample Destroyed (Lab Use Only)
  • 226 Waste
  • 239 API Adjustment Error
  • 238 API Conversion Error
  • 237 During License-to-License Transfer
  • 236 Entry Error
  • 235 In-House Quality Control
  • 234 Moisture Loss/Gain
  • 233 Package Material
  • 232 Plant Death
  • 230 Scale Variance
  • 229 Spoilage
  • 228 Theft
  • 227 Trade Sample
• METRC RI
  • 0 other (Allowable value, not sent to METRC)
  • 205 Consumed during Testing
  • 200 Waste
  • 204 Entry Error
  • 317 QA Sample to RIDOH
  • 203 Scale Variance
  • 202 Spoilage
  • 201 Theft
• METRC SD
  • 0 other (Allowable value, not sent to METRC)
  • 260 Waste
  • 262 Drying
  • 261 Entry Error
• METRC Tribal Nations
  • 0 other (Allowable value, not sent to METRC)
  • 312 Test Sample Consumed in Testing
  • 309 Waste
  • 316 Entry Error
  • 315 Plants Unpacked
  • 314 Scale Variance
  • 313 Spoilage
  • 311 Theft
  • 310 Transfer Error
• METRC 29 Palms
  • 0 other (Allowable value, not sent to METRC)
  • 265 Waste (Unusable Product)
  • 273 Damage
  • 272 Enforcement Testing
  • 271 Incorrect Quantity
  • 270 Mandated Destruction
  • 269 Over Pulled
  • 268 TCC-Authorized Adjustment
  • 267 Theft
  • 266 Under Pulled
  • 264 Weight Change Due to Moisture